Obstetrics

In medicine, there are many diseases and conditions that pose significant challenges to health care practitioners. For example, within brain science, there are patients with debilitating neurodegenerative diseases; within emergency medicine, there are patients who have suffered severe and acute trauma; within pediatrics, there are patients with terminal illnesses, such as cancer. In ob.gyn., one of the great obstetrical syndromes is preeclampsia.

Humans have known about preeclampsia for thousands of years, dating back to the 4th and 5th centuries B.C., since the time of Hippocrates. Ancient writings on medical conditions of women reflect a recognition of preeclampsia and eclampsia, although formal classification of the condition as a hypertensive disorder associated specifically with pregnancy did not occur until the late 1800s. Despite this, the pathology of preeclampsia is significantly underdefined, and because the underlying causes of preeclampsia are largely unknown, prevention and management continue to be hindered.

Dr. Reece, who specializes in maternal-fetal medicine, is vice president for medical affairs at the University of Maryland, Baltimore, as well as the John Z. and Akiko K. Bowers Distinguished Professor and dean of the school of medicine. Dr. Reece said he had no relevant financial disclosures. He is the medical editor of this column. Contact him at [email protected].

In medicine, there are many diseases and conditions that pose significant challenges to health care practitioners. For example, within brain science, there are patients with debilitating neurodegenerative diseases; within emergency medicine, there are patients who have suffered severe and acute trauma; within pediatrics, there are patients with terminal illnesses, such as cancer. In ob.gyn., one of the great obstetrical syndromes is preeclampsia.

Humans have known about preeclampsia for thousands of years, dating back to the 4th and 5th centuries B.C., since the time of Hippocrates. Ancient writings on medical conditions of women reflect a recognition of preeclampsia and eclampsia, although formal classification of the condition as a hypertensive disorder associated specifically with pregnancy did not occur until the late 1800s. Despite this, the pathology of preeclampsia is significantly underdefined, and because the underlying causes of preeclampsia are largely unknown, prevention and management continue to be hindered.

Dr. Reece, who specializes in maternal-fetal medicine, is vice president for medical affairs at the University of Maryland, Baltimore, as well as the John Z. and Akiko K. Bowers Distinguished Professor and dean of the school of medicine. Dr. Reece said he had no relevant financial disclosures. He is the medical editor of this column. Contact him at [email protected].

In medicine, there are many diseases and conditions that pose significant challenges to health care practitioners. For example, within brain science, there are patients with debilitating neurodegenerative diseases; within emergency medicine, there are patients who have suffered severe and acute trauma; within pediatrics, there are patients with terminal illnesses, such as cancer. In ob.gyn., one of the great obstetrical syndromes is preeclampsia.

Humans have known about preeclampsia for thousands of years, dating back to the 4th and 5th centuries B.C., since the time of Hippocrates. Ancient writings on medical conditions of women reflect a recognition of preeclampsia and eclampsia, although formal classification of the condition as a hypertensive disorder associated specifically with pregnancy did not occur until the late 1800s. Despite this, the pathology of preeclampsia is significantly underdefined, and because the underlying causes of preeclampsia are largely unknown, prevention and management continue to be hindered.

Dr. Reece, who specializes in maternal-fetal medicine, is vice president for medical affairs at the University of Maryland, Baltimore, as well as the John Z. and Akiko K. Bowers Distinguished Professor and dean of the school of medicine. Dr. Reece said he had no relevant financial disclosures. He is the medical editor of this column. Contact him at [email protected].

WASHINGTON – George R. Saade, MD, wants to see a Time magazine cover story like the 2010 feature titled, “How the first 9 months shape the rest of your life” – except this new story would read “How the first 9 months shape the rest of the mother’s life.”

It’s time, he says, that pregnancy truly be appreciated as a “window to future health” for the mother as well as for the baby, and that the term “maternal care” replaces prenatal care. “How many of your [primary care] providers have asked you if you’ve had any pregnancies and if any of your pregnancies were complicated by hypertension, preterm delivery, growth restriction, or gestational diabetes?” Dr. Saade asked at the biennial meeting of the Diabetes in Pregnancy Study Group of North America.

“It’s better than before, but not good enough ... Checking with patients 6 weeks postpartum is not enough” to prevent long-term metabolic and cardiovascular disorders, he said. “We need regular screening of women.”

The relationship between gestational diabetes (GDM) and subsequent type 2 diabetes, demonstrated several decades ago, offered the “first evidence that pregnancy is a window to future health,” and evidence of the relationship continues to grow. “We know today that there is no other predictive marker of type 2 diabetes that is better and stronger than gestational diabetes,” said Dr. Saade, chief of obstetrics and maternal-fetal medicine at the University of Texas Medical Branch, Galveston.

GDM has also recently been shown to elevate cardiovascular risk independent of its association with type 2 diabetes and metabolic disease.

And similarly, there is now an incontrovertible body of evidence that women who have had preeclampsia are at significantly higher risk of developing hypertension, stroke, and ischemic heart disease later in life than are women who have not have preeclampsia, Dr. Saade said.

Layered evidence

The study that first caught Dr. Saade’s attention was a large Norwegian population-based study published in 2001 that looked at maternal mortality up to 25 years after pregnancy. Women who had preeclampsia had a 1.2-fold higher long-term risk of death from cardiovascular diseases, cancer, and stroke – and women with a history of both preeclampsia and a preterm delivery had a 2.71-fold higher risk – than that of women without such history.

Looking at cardiovascular causes of death specifically, the risk among women with both preeclampsia and preterm delivery was 8.12-fold higher than in women who did not have preeclampsia.

Since then, studies and reviews conducted in the United States and Europe have shown that a history of preeclampsia doubles the risk of developing cardiovascular disease, more than triples the risk of later hypertension, and also increases the risk of stroke, though more moderately.

Recently, Dr. Saade said, researchers have also begun reporting subclinical cardiac abnormalities in women with a history of preeclampsia. A study of 107 women with preeclampsia and 41 women with uneventful pregnancies found that the prevalence of subclinical heart failure (heart failure Stage B) was approximately 3.5% higher in the short term in the preeclampsia group. The women underwent regular cardiac ultrasound and other cardiovascular risk assessment tests 4-10 years postpartum (Ultrasound Obstet Gynecol. 2017;49[1]:143-9).

Preterm delivery and small for gestational age have also been associated with increased risk of ischemic heart disease and other cardiovascular events later in life. And gestational hypertension, research has shown, is a clear risk factor for later hypertension. “We always think of preeclampsia as a different disease, but as far as long-term health is concerned, it doesn’t matter if a woman had preeclampsia or gestational hypertension; she’s still at [greater] risk for hypertension later,” Dr. Saade said.

“And we don’t have to wait 30 years to see evidence” of the association between pregnancy complications and adverse cardiovascular outcomes, he emphasized. A recent retrospective cohort study of more than 300,000 women in Florida showed that women who experienced a maternal placental syndrome during their first pregnancy were at higher risk of subsequent cardiovascular disease during just 5 years of follow-up (Am J Obstet Gynecol. 2016;215[4]:484.e1-14).

Into practice

Regular screening of women whose pregnancies were complicated by conditions associated with long-term health risks “need not be that sophisticated,” Dr. Saade said. Measurement of blood pressure, waist circumference, fasting lipid profile, and fasting glucose is often enough for basic maternal health surveillance, he said.

Dr. Saade said he and some other experts in the field are recommending yearly follow-up for patients who’ve had preeclampsia and other complications. Among the other experts urging early heart disease risk screening is Graeme N. Smith, MD, PhD, an ob.gyn in Ontario who has developed surveillance protocols, follow-up forms, and risk prediction tools for use in a maternal health clinic he established at Kingston General Hospital, Queens University. At the meeting, Dr. Saade encouraged the audience to access Dr. Smith’s resources.

The American Heart Association, in its 2011 guidelines for cardiovascular disease prevention in women, includes pregnancy risks factors (specifically a history of preeclampsia, gestational diabetes, or pregnancy-induced hypertension) as part of its list of major factors for use in risk assessment (Circulation. 2011;123:1243-62).

But as Erica P. Gunderson, PhD, MPH, of Kaiser Permanente Northern California’s division of research, pointed out during another presentation at the meeting, there is more work to be done. Reproductive history is not included in existing disease prediction or risk stratification models for atherosclerotic cardiovascular disease, making it hard at this point to devise specific screening protocols and schedules, especially when it comes to a history of GDM, she said.

“We need more coordinated systems, surveillance in younger women, and some prediction models so that we can know who is at highest risk and needs more surveillance,” she said.

The AHA’s inclusion of GDM history is based on its strong link to overt diabetes, but recent evidence has shown that a history of GDM can independently elevate cardiovascular risk, she noted. Research from the Nurses Health Study II cohort, for instance, found a 30% higher relative risk of cardiovascular events (myocardial infarction and stroke) in women with a history of GDM without progression to diabetes, compared with women who did not have GDM or diabetes (JAMA Intern Med. 2017;177[12]:1735-42).

Dr. Gunderson has also found through analyses of the Coronary Artery Risk Development in Young Adults study data that women who had GDM but did not go on to develop overt diabetes or impaired glycemia had greater carotid intima media thickness many years post delivery than did women without a history of gestational diabetes (J Am Heart Assoc. 2014;3[2]:e000490).

In some models, she has written, this difference in carotid intima media thickness could represent 3-5 years of greater vascular aging for women with previous gestational diabetes and no apparent metabolic dysfunction outside of pregnancy (JAMA Intern Med. 2017;177[12]:1742-4).

There’s a question, she and Dr. Saade both noted, of whether pregnancies unmask previous dispositions to cardiovascular disease or whether pregnancy complications more directly drive adverse long-term outcomes. There is evidence that disorders such as GDM, Dr. Gunderson said, are superimposed on already altered metabolism. But at this time, Dr. Saade said, it appears that “the answer is both.”

According to Dr. Saade, at least three studies are currently following women prospectively to learn more about pregnancy as a window to future cardiovascular health. One of them is the National Institute of Child Health and Human Development’s Nulliparous Pregnancy Outcomes Study–Monitoring Mothers-to-Be Heart Health Study; some data from this study will be presented soon, he said.

Both Dr. Saade and Dr. Gunderson reported in their presentations that they had no disclosures.

WASHINGTON – George R. Saade, MD, wants to see a Time magazine cover story like the 2010 feature titled, “How the first 9 months shape the rest of your life” – except this new story would read “How the first 9 months shape the rest of the mother’s life.”

It’s time, he says, that pregnancy truly be appreciated as a “window to future health” for the mother as well as for the baby, and that the term “maternal care” replaces prenatal care. “How many of your [primary care] providers have asked you if you’ve had any pregnancies and if any of your pregnancies were complicated by hypertension, preterm delivery, growth restriction, or gestational diabetes?” Dr. Saade asked at the biennial meeting of the Diabetes in Pregnancy Study Group of North America.

“It’s better than before, but not good enough ... Checking with patients 6 weeks postpartum is not enough” to prevent long-term metabolic and cardiovascular disorders, he said. “We need regular screening of women.”

The relationship between gestational diabetes (GDM) and subsequent type 2 diabetes, demonstrated several decades ago, offered the “first evidence that pregnancy is a window to future health,” and evidence of the relationship continues to grow. “We know today that there is no other predictive marker of type 2 diabetes that is better and stronger than gestational diabetes,” said Dr. Saade, chief of obstetrics and maternal-fetal medicine at the University of Texas Medical Branch, Galveston.

GDM has also recently been shown to elevate cardiovascular risk independent of its association with type 2 diabetes and metabolic disease.

And similarly, there is now an incontrovertible body of evidence that women who have had preeclampsia are at significantly higher risk of developing hypertension, stroke, and ischemic heart disease later in life than are women who have not have preeclampsia, Dr. Saade said.

Layered evidence

The study that first caught Dr. Saade’s attention was a large Norwegian population-based study published in 2001 that looked at maternal mortality up to 25 years after pregnancy. Women who had preeclampsia had a 1.2-fold higher long-term risk of death from cardiovascular diseases, cancer, and stroke – and women with a history of both preeclampsia and a preterm delivery had a 2.71-fold higher risk – than that of women without such history.

Looking at cardiovascular causes of death specifically, the risk among women with both preeclampsia and preterm delivery was 8.12-fold higher than in women who did not have preeclampsia.

Since then, studies and reviews conducted in the United States and Europe have shown that a history of preeclampsia doubles the risk of developing cardiovascular disease, more than triples the risk of later hypertension, and also increases the risk of stroke, though more moderately.

Recently, Dr. Saade said, researchers have also begun reporting subclinical cardiac abnormalities in women with a history of preeclampsia. A study of 107 women with preeclampsia and 41 women with uneventful pregnancies found that the prevalence of subclinical heart failure (heart failure Stage B) was approximately 3.5% higher in the short term in the preeclampsia group. The women underwent regular cardiac ultrasound and other cardiovascular risk assessment tests 4-10 years postpartum (Ultrasound Obstet Gynecol. 2017;49[1]:143-9).

Preterm delivery and small for gestational age have also been associated with increased risk of ischemic heart disease and other cardiovascular events later in life. And gestational hypertension, research has shown, is a clear risk factor for later hypertension. “We always think of preeclampsia as a different disease, but as far as long-term health is concerned, it doesn’t matter if a woman had preeclampsia or gestational hypertension; she’s still at [greater] risk for hypertension later,” Dr. Saade said.

“And we don’t have to wait 30 years to see evidence” of the association between pregnancy complications and adverse cardiovascular outcomes, he emphasized. A recent retrospective cohort study of more than 300,000 women in Florida showed that women who experienced a maternal placental syndrome during their first pregnancy were at higher risk of subsequent cardiovascular disease during just 5 years of follow-up (Am J Obstet Gynecol. 2016;215[4]:484.e1-14).

Into practice

Regular screening of women whose pregnancies were complicated by conditions associated with long-term health risks “need not be that sophisticated,” Dr. Saade said. Measurement of blood pressure, waist circumference, fasting lipid profile, and fasting glucose is often enough for basic maternal health surveillance, he said.

Dr. Saade said he and some other experts in the field are recommending yearly follow-up for patients who’ve had preeclampsia and other complications. Among the other experts urging early heart disease risk screening is Graeme N. Smith, MD, PhD, an ob.gyn in Ontario who has developed surveillance protocols, follow-up forms, and risk prediction tools for use in a maternal health clinic he established at Kingston General Hospital, Queens University. At the meeting, Dr. Saade encouraged the audience to access Dr. Smith’s resources.

The American Heart Association, in its 2011 guidelines for cardiovascular disease prevention in women, includes pregnancy risks factors (specifically a history of preeclampsia, gestational diabetes, or pregnancy-induced hypertension) as part of its list of major factors for use in risk assessment (Circulation. 2011;123:1243-62).

But as Erica P. Gunderson, PhD, MPH, of Kaiser Permanente Northern California’s division of research, pointed out during another presentation at the meeting, there is more work to be done. Reproductive history is not included in existing disease prediction or risk stratification models for atherosclerotic cardiovascular disease, making it hard at this point to devise specific screening protocols and schedules, especially when it comes to a history of GDM, she said.

“We need more coordinated systems, surveillance in younger women, and some prediction models so that we can know who is at highest risk and needs more surveillance,” she said.

The AHA’s inclusion of GDM history is based on its strong link to overt diabetes, but recent evidence has shown that a history of GDM can independently elevate cardiovascular risk, she noted. Research from the Nurses Health Study II cohort, for instance, found a 30% higher relative risk of cardiovascular events (myocardial infarction and stroke) in women with a history of GDM without progression to diabetes, compared with women who did not have GDM or diabetes (JAMA Intern Med. 2017;177[12]:1735-42).

Dr. Gunderson has also found through analyses of the Coronary Artery Risk Development in Young Adults study data that women who had GDM but did not go on to develop overt diabetes or impaired glycemia had greater carotid intima media thickness many years post delivery than did women without a history of gestational diabetes (J Am Heart Assoc. 2014;3[2]:e000490).

In some models, she has written, this difference in carotid intima media thickness could represent 3-5 years of greater vascular aging for women with previous gestational diabetes and no apparent metabolic dysfunction outside of pregnancy (JAMA Intern Med. 2017;177[12]:1742-4).

There’s a question, she and Dr. Saade both noted, of whether pregnancies unmask previous dispositions to cardiovascular disease or whether pregnancy complications more directly drive adverse long-term outcomes. There is evidence that disorders such as GDM, Dr. Gunderson said, are superimposed on already altered metabolism. But at this time, Dr. Saade said, it appears that “the answer is both.”

According to Dr. Saade, at least three studies are currently following women prospectively to learn more about pregnancy as a window to future cardiovascular health. One of them is the National Institute of Child Health and Human Development’s Nulliparous Pregnancy Outcomes Study–Monitoring Mothers-to-Be Heart Health Study; some data from this study will be presented soon, he said.

Both Dr. Saade and Dr. Gunderson reported in their presentations that they had no disclosures.

WASHINGTON – George R. Saade, MD, wants to see a Time magazine cover story like the 2010 feature titled, “How the first 9 months shape the rest of your life” – except this new story would read “How the first 9 months shape the rest of the mother’s life.”

It’s time, he says, that pregnancy truly be appreciated as a “window to future health” for the mother as well as for the baby, and that the term “maternal care” replaces prenatal care. “How many of your [primary care] providers have asked you if you’ve had any pregnancies and if any of your pregnancies were complicated by hypertension, preterm delivery, growth restriction, or gestational diabetes?” Dr. Saade asked at the biennial meeting of the Diabetes in Pregnancy Study Group of North America.

“It’s better than before, but not good enough ... Checking with patients 6 weeks postpartum is not enough” to prevent long-term metabolic and cardiovascular disorders, he said. “We need regular screening of women.”

The relationship between gestational diabetes (GDM) and subsequent type 2 diabetes, demonstrated several decades ago, offered the “first evidence that pregnancy is a window to future health,” and evidence of the relationship continues to grow. “We know today that there is no other predictive marker of type 2 diabetes that is better and stronger than gestational diabetes,” said Dr. Saade, chief of obstetrics and maternal-fetal medicine at the University of Texas Medical Branch, Galveston.

GDM has also recently been shown to elevate cardiovascular risk independent of its association with type 2 diabetes and metabolic disease.

And similarly, there is now an incontrovertible body of evidence that women who have had preeclampsia are at significantly higher risk of developing hypertension, stroke, and ischemic heart disease later in life than are women who have not have preeclampsia, Dr. Saade said.

Layered evidence

The study that first caught Dr. Saade’s attention was a large Norwegian population-based study published in 2001 that looked at maternal mortality up to 25 years after pregnancy. Women who had preeclampsia had a 1.2-fold higher long-term risk of death from cardiovascular diseases, cancer, and stroke – and women with a history of both preeclampsia and a preterm delivery had a 2.71-fold higher risk – than that of women without such history.

Looking at cardiovascular causes of death specifically, the risk among women with both preeclampsia and preterm delivery was 8.12-fold higher than in women who did not have preeclampsia.

Since then, studies and reviews conducted in the United States and Europe have shown that a history of preeclampsia doubles the risk of developing cardiovascular disease, more than triples the risk of later hypertension, and also increases the risk of stroke, though more moderately.

Recently, Dr. Saade said, researchers have also begun reporting subclinical cardiac abnormalities in women with a history of preeclampsia. A study of 107 women with preeclampsia and 41 women with uneventful pregnancies found that the prevalence of subclinical heart failure (heart failure Stage B) was approximately 3.5% higher in the short term in the preeclampsia group. The women underwent regular cardiac ultrasound and other cardiovascular risk assessment tests 4-10 years postpartum (Ultrasound Obstet Gynecol. 2017;49[1]:143-9).

Preterm delivery and small for gestational age have also been associated with increased risk of ischemic heart disease and other cardiovascular events later in life. And gestational hypertension, research has shown, is a clear risk factor for later hypertension. “We always think of preeclampsia as a different disease, but as far as long-term health is concerned, it doesn’t matter if a woman had preeclampsia or gestational hypertension; she’s still at [greater] risk for hypertension later,” Dr. Saade said.

“And we don’t have to wait 30 years to see evidence” of the association between pregnancy complications and adverse cardiovascular outcomes, he emphasized. A recent retrospective cohort study of more than 300,000 women in Florida showed that women who experienced a maternal placental syndrome during their first pregnancy were at higher risk of subsequent cardiovascular disease during just 5 years of follow-up (Am J Obstet Gynecol. 2016;215[4]:484.e1-14).

Into practice

Regular screening of women whose pregnancies were complicated by conditions associated with long-term health risks “need not be that sophisticated,” Dr. Saade said. Measurement of blood pressure, waist circumference, fasting lipid profile, and fasting glucose is often enough for basic maternal health surveillance, he said.

Dr. Saade said he and some other experts in the field are recommending yearly follow-up for patients who’ve had preeclampsia and other complications. Among the other experts urging early heart disease risk screening is Graeme N. Smith, MD, PhD, an ob.gyn in Ontario who has developed surveillance protocols, follow-up forms, and risk prediction tools for use in a maternal health clinic he established at Kingston General Hospital, Queens University. At the meeting, Dr. Saade encouraged the audience to access Dr. Smith’s resources.

The American Heart Association, in its 2011 guidelines for cardiovascular disease prevention in women, includes pregnancy risks factors (specifically a history of preeclampsia, gestational diabetes, or pregnancy-induced hypertension) as part of its list of major factors for use in risk assessment (Circulation. 2011;123:1243-62).

But as Erica P. Gunderson, PhD, MPH, of Kaiser Permanente Northern California’s division of research, pointed out during another presentation at the meeting, there is more work to be done. Reproductive history is not included in existing disease prediction or risk stratification models for atherosclerotic cardiovascular disease, making it hard at this point to devise specific screening protocols and schedules, especially when it comes to a history of GDM, she said.

“We need more coordinated systems, surveillance in younger women, and some prediction models so that we can know who is at highest risk and needs more surveillance,” she said.

The AHA’s inclusion of GDM history is based on its strong link to overt diabetes, but recent evidence has shown that a history of GDM can independently elevate cardiovascular risk, she noted. Research from the Nurses Health Study II cohort, for instance, found a 30% higher relative risk of cardiovascular events (myocardial infarction and stroke) in women with a history of GDM without progression to diabetes, compared with women who did not have GDM or diabetes (JAMA Intern Med. 2017;177[12]:1735-42).

Dr. Gunderson has also found through analyses of the Coronary Artery Risk Development in Young Adults study data that women who had GDM but did not go on to develop overt diabetes or impaired glycemia had greater carotid intima media thickness many years post delivery than did women without a history of gestational diabetes (J Am Heart Assoc. 2014;3[2]:e000490).

In some models, she has written, this difference in carotid intima media thickness could represent 3-5 years of greater vascular aging for women with previous gestational diabetes and no apparent metabolic dysfunction outside of pregnancy (JAMA Intern Med. 2017;177[12]:1742-4).

There’s a question, she and Dr. Saade both noted, of whether pregnancies unmask previous dispositions to cardiovascular disease or whether pregnancy complications more directly drive adverse long-term outcomes. There is evidence that disorders such as GDM, Dr. Gunderson said, are superimposed on already altered metabolism. But at this time, Dr. Saade said, it appears that “the answer is both.”

According to Dr. Saade, at least three studies are currently following women prospectively to learn more about pregnancy as a window to future cardiovascular health. One of them is the National Institute of Child Health and Human Development’s Nulliparous Pregnancy Outcomes Study–Monitoring Mothers-to-Be Heart Health Study; some data from this study will be presented soon, he said.

Both Dr. Saade and Dr. Gunderson reported in their presentations that they had no disclosures.

There are currently 15 drugs indicated for adverse conditions of the urinary tract. The reported frequency of use in pregnancy and during breastfeeding for most of these agents is very low or completely absent.

The five subclasses of urinary tract agents are analgesics, antispasmodics, urinary acidifiers, urinary alkalinizers, and urinary germicides. With the exception of the three urinary germicides, anti-infectives are not covered in this column.

Analgesics

The analgesic subclass includes pentosan and phenazopyridine. Pentosan (Elmiron), a heparinlike compound, is an oral drug that is indicated for the relief of bladder pain or discomfort associated with interstitial cystitis. Systemic absorption is low, at about 6%. Because of the high molecular weight (4,000-6,000), it does not appear to cross the placenta, at least in the first half of pregnancy. A 1975 reference described its use in five women with preeclampsia. Each patient received 100 mg intramuscularly every 8 hours for about 5 days in the last weeks of pregnancy. No maternal benefit from the therapy was observed. There was apparently no fetal harm, but the neonatal outcomes were not described.

There are substantial – more than 900 – human pregnancy exposures in the first trimester with phenazopyridine. The exposures were not related to an increased risk of embryo-fetal harm and so use of the drug in pregnancy can be classified as compatible. However, the low molecular weight (about 214 for the free base) suggests that the drug will cross to the embryo and fetus.
 

Antispasmodics

The eight antispasmodics are darifenacin (Enablex), fesoterodine (Toviaz), flavoxate, mirabegron (Myrbetriq), oxybutynin (Ditropan XL), solifenacin (Vesicare), tolterodine (Detrol LA), and trospium.

These agents are indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency. The molecular weights range between 342 and 508, suggesting that all will cross the human placenta. There are no human pregnancy data for six of these agents and very limited data for flavoxate and oxybutynin. There is no evidence of embryo-fetal harm from these two drugs, but only one case involved exposure in the first trimester.

In seven of these drugs, the animal data suggested low risk. There was no embryo harm from doses that were equal to or less than 10 times the human dose based on body surface area (BSA) or area under the concentration curve (AUC). Solifenacin did cause embryo toxicity in pregnant mice. There was no embryo toxicity in pregnant rats and rabbits, but the maximum doses used were very low. Overall, the available data suggest that exposure to an antispasmodic in pregnancy is low risk for embryo, fetal, and newborn harm.
 

Urinary acidifiers

Ammonium chloride is a urinary acidifier as well as a respiratory expectorant. There is a large amount of data related to when the drug was used as an expectorant. There was no evidence that this use was associated with large categories of major or minor malformations. However, there were possible associations with three individual defects: inguinal hernia, cataract, and any benign tumor. No reports describing its use as a urinary acidifier have been located. When large amounts are consumed near term, the drug may cause acidosis in the mother and fetus. The molecular weight (about 53) suggests that it will cross the placenta.

Urinary alkalinizers

Potassium citrate (Urocit-K) is indicated for the management of renal tubular acidosis with calcium stones, hypocitraturic calcium oxalate with nephrolithiasis of any etiology, and uric acid lithiasis with or without calcium stones. The molecular weight (about 307) suggests it will cross the placenta. Only one case of its use in pregnancy has been located. The newborn had an unspecified defect but no other information was provided. The animal data in four species suggest low risk.

Urinary germicides

There are three urinary germicides: methenamine, methylene blue, and nitrofurantoin. Methenamine is available as methenamine mandelate (molecular weight abut 292) and methenamine hippurate (molecular weight about 319). Both are metabolized to formaldehyde (molecular weight about 30), the active agent. The molecular weights suggest that all will cross the placenta. The use of methenamine during pregnancy has been reported in more than 750 pregnancies. There have been no embryo or fetal adverse effects attributed to the drug.

The human data involving oral methylene blue, a weak urinary germicide, is limited to 55 exposures. There were three infants with birth defects (type not specified). Several reports have described the use of intra-amniotic injections to assist in the diagnosis of suspected membrane rupture. This use has resulted in newborns with hemolytic anemia, hyperbilirubinemia with or without Heinz body formation, blue staining of the skin, and methemoglobinemia. Fetal deaths have also been described. Recommendations to avoid the intra-amniotic use of methylene blue were issued more than 10 years ago. Moreover, the use of oral methylene blue as a urinary germicide is no longer recommended.

The low molecular weight (about 238) of nitrofurantoin suggests that it will cross the placenta. It is commonly used in pregnancy for the treatment or prophylaxis of urinary tract infections. The large amount of human data indicates that the risk of drug-induced birth defects is low. Several cohort studies have found no increased risk for birth defects. However, some case-control studies have found increased risks for hypoplastic left heart syndrome and oral clefts. A 2015 review concluded that this difference was due to the increased sensitivity of case-control studies to detect adverse effects (J Obstet Gynaecol Can. 2015 Feb;37[2]:150-6).

Use of the drug close to term may cause hemolytic anemia in newborns who are glucose-6-phosphate dehydrogenase (G6PD) deficient. Although rare, this may also occur in newborns who are not G6PD deficient. The best course is to avoid use of the drug close to delivery. As for use of the drug in the first trimester, ACOG’s Committee on Obstetric Practice stated in Committee Opinion No. 717 that nitrofurantoin was still thought to be appropriate when no other suitable alternative antibiotics were available (Obstet Gynecol. 2017 Sept;130[3]:666-7).
 

Breastfeeding

Except for methenamine and nitrofurantoin, there are no data related to the use of the urinary tract drugs during breastfeeding. Peak levels of methenamine occur at 1 hour, but no reports of adverse effects on nursing infants have been located. Several reports have described the use of nitrofurantoin during breastfeeding. Minor diarrhea was noted in two infants. However, breastfeeding an infant with G6PD deficiency could lead to hemolytic anemia.

Phenazopyridine should be used with caution especially for an infant younger than 1 month or with G6PD deficiency because of the risk for methemoglobinemia, sulfhemoglobinemia, and hemolytic anemia.

Although there have been no reports of the use of mirabegron during lactation, the characteristics of the drug – low molecular weight (about 397), long elimination half life (50 hours), and moderate plasma protein binding (about 71%) – suggest that the drug will be excreted into milk, potentially in clinically significant amounts. There is also concern with use of tolterodine (molecular weight about 476) because both the primary drug and its equipotent metabolite may be excreted into milk.
 

Mr. Briggs is a clinical professor of pharmacy at the University of California, San Francisco, and an adjunct professor of pharmacy at the University of Southern California, Los Angeles, as well as at Washington State University, Spokane. He coauthored “Drugs in Pregnancy and Lactation” and coedited “Diseases, Complications, and Drug Therapy in Obstetrics.” He reported having no relevant financial disclosures.

There are currently 15 drugs indicated for adverse conditions of the urinary tract. The reported frequency of use in pregnancy and during breastfeeding for most of these agents is very low or completely absent.

The five subclasses of urinary tract agents are analgesics, antispasmodics, urinary acidifiers, urinary alkalinizers, and urinary germicides. With the exception of the three urinary germicides, anti-infectives are not covered in this column.

Analgesics

The analgesic subclass includes pentosan and phenazopyridine. Pentosan (Elmiron), a heparinlike compound, is an oral drug that is indicated for the relief of bladder pain or discomfort associated with interstitial cystitis. Systemic absorption is low, at about 6%. Because of the high molecular weight (4,000-6,000), it does not appear to cross the placenta, at least in the first half of pregnancy. A 1975 reference described its use in five women with preeclampsia. Each patient received 100 mg intramuscularly every 8 hours for about 5 days in the last weeks of pregnancy. No maternal benefit from the therapy was observed. There was apparently no fetal harm, but the neonatal outcomes were not described.

There are substantial – more than 900 – human pregnancy exposures in the first trimester with phenazopyridine. The exposures were not related to an increased risk of embryo-fetal harm and so use of the drug in pregnancy can be classified as compatible. However, the low molecular weight (about 214 for the free base) suggests that the drug will cross to the embryo and fetus.
 

Antispasmodics

The eight antispasmodics are darifenacin (Enablex), fesoterodine (Toviaz), flavoxate, mirabegron (Myrbetriq), oxybutynin (Ditropan XL), solifenacin (Vesicare), tolterodine (Detrol LA), and trospium.

These agents are indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency. The molecular weights range between 342 and 508, suggesting that all will cross the human placenta. There are no human pregnancy data for six of these agents and very limited data for flavoxate and oxybutynin. There is no evidence of embryo-fetal harm from these two drugs, but only one case involved exposure in the first trimester.

In seven of these drugs, the animal data suggested low risk. There was no embryo harm from doses that were equal to or less than 10 times the human dose based on body surface area (BSA) or area under the concentration curve (AUC). Solifenacin did cause embryo toxicity in pregnant mice. There was no embryo toxicity in pregnant rats and rabbits, but the maximum doses used were very low. Overall, the available data suggest that exposure to an antispasmodic in pregnancy is low risk for embryo, fetal, and newborn harm.
 

Urinary acidifiers

Ammonium chloride is a urinary acidifier as well as a respiratory expectorant. There is a large amount of data related to when the drug was used as an expectorant. There was no evidence that this use was associated with large categories of major or minor malformations. However, there were possible associations with three individual defects: inguinal hernia, cataract, and any benign tumor. No reports describing its use as a urinary acidifier have been located. When large amounts are consumed near term, the drug may cause acidosis in the mother and fetus. The molecular weight (about 53) suggests that it will cross the placenta.

Urinary alkalinizers

Potassium citrate (Urocit-K) is indicated for the management of renal tubular acidosis with calcium stones, hypocitraturic calcium oxalate with nephrolithiasis of any etiology, and uric acid lithiasis with or without calcium stones. The molecular weight (about 307) suggests it will cross the placenta. Only one case of its use in pregnancy has been located. The newborn had an unspecified defect but no other information was provided. The animal data in four species suggest low risk.

Urinary germicides

There are three urinary germicides: methenamine, methylene blue, and nitrofurantoin. Methenamine is available as methenamine mandelate (molecular weight abut 292) and methenamine hippurate (molecular weight about 319). Both are metabolized to formaldehyde (molecular weight about 30), the active agent. The molecular weights suggest that all will cross the placenta. The use of methenamine during pregnancy has been reported in more than 750 pregnancies. There have been no embryo or fetal adverse effects attributed to the drug.

The human data involving oral methylene blue, a weak urinary germicide, is limited to 55 exposures. There were three infants with birth defects (type not specified). Several reports have described the use of intra-amniotic injections to assist in the diagnosis of suspected membrane rupture. This use has resulted in newborns with hemolytic anemia, hyperbilirubinemia with or without Heinz body formation, blue staining of the skin, and methemoglobinemia. Fetal deaths have also been described. Recommendations to avoid the intra-amniotic use of methylene blue were issued more than 10 years ago. Moreover, the use of oral methylene blue as a urinary germicide is no longer recommended.

The low molecular weight (about 238) of nitrofurantoin suggests that it will cross the placenta. It is commonly used in pregnancy for the treatment or prophylaxis of urinary tract infections. The large amount of human data indicates that the risk of drug-induced birth defects is low. Several cohort studies have found no increased risk for birth defects. However, some case-control studies have found increased risks for hypoplastic left heart syndrome and oral clefts. A 2015 review concluded that this difference was due to the increased sensitivity of case-control studies to detect adverse effects (J Obstet Gynaecol Can. 2015 Feb;37[2]:150-6).

Use of the drug close to term may cause hemolytic anemia in newborns who are glucose-6-phosphate dehydrogenase (G6PD) deficient. Although rare, this may also occur in newborns who are not G6PD deficient. The best course is to avoid use of the drug close to delivery. As for use of the drug in the first trimester, ACOG’s Committee on Obstetric Practice stated in Committee Opinion No. 717 that nitrofurantoin was still thought to be appropriate when no other suitable alternative antibiotics were available (Obstet Gynecol. 2017 Sept;130[3]:666-7).
 

Breastfeeding

Except for methenamine and nitrofurantoin, there are no data related to the use of the urinary tract drugs during breastfeeding. Peak levels of methenamine occur at 1 hour, but no reports of adverse effects on nursing infants have been located. Several reports have described the use of nitrofurantoin during breastfeeding. Minor diarrhea was noted in two infants. However, breastfeeding an infant with G6PD deficiency could lead to hemolytic anemia.

Phenazopyridine should be used with caution especially for an infant younger than 1 month or with G6PD deficiency because of the risk for methemoglobinemia, sulfhemoglobinemia, and hemolytic anemia.

Although there have been no reports of the use of mirabegron during lactation, the characteristics of the drug – low molecular weight (about 397), long elimination half life (50 hours), and moderate plasma protein binding (about 71%) – suggest that the drug will be excreted into milk, potentially in clinically significant amounts. There is also concern with use of tolterodine (molecular weight about 476) because both the primary drug and its equipotent metabolite may be excreted into milk.
 

Mr. Briggs is a clinical professor of pharmacy at the University of California, San Francisco, and an adjunct professor of pharmacy at the University of Southern California, Los Angeles, as well as at Washington State University, Spokane. He coauthored “Drugs in Pregnancy and Lactation” and coedited “Diseases, Complications, and Drug Therapy in Obstetrics.” He reported having no relevant financial disclosures.

There are currently 15 drugs indicated for adverse conditions of the urinary tract. The reported frequency of use in pregnancy and during breastfeeding for most of these agents is very low or completely absent.

The five subclasses of urinary tract agents are analgesics, antispasmodics, urinary acidifiers, urinary alkalinizers, and urinary germicides. With the exception of the three urinary germicides, anti-infectives are not covered in this column.

Analgesics

The analgesic subclass includes pentosan and phenazopyridine. Pentosan (Elmiron), a heparinlike compound, is an oral drug that is indicated for the relief of bladder pain or discomfort associated with interstitial cystitis. Systemic absorption is low, at about 6%. Because of the high molecular weight (4,000-6,000), it does not appear to cross the placenta, at least in the first half of pregnancy. A 1975 reference described its use in five women with preeclampsia. Each patient received 100 mg intramuscularly every 8 hours for about 5 days in the last weeks of pregnancy. No maternal benefit from the therapy was observed. There was apparently no fetal harm, but the neonatal outcomes were not described.

There are substantial – more than 900 – human pregnancy exposures in the first trimester with phenazopyridine. The exposures were not related to an increased risk of embryo-fetal harm and so use of the drug in pregnancy can be classified as compatible. However, the low molecular weight (about 214 for the free base) suggests that the drug will cross to the embryo and fetus.
 

Antispasmodics

The eight antispasmodics are darifenacin (Enablex), fesoterodine (Toviaz), flavoxate, mirabegron (Myrbetriq), oxybutynin (Ditropan XL), solifenacin (Vesicare), tolterodine (Detrol LA), and trospium.

These agents are indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency. The molecular weights range between 342 and 508, suggesting that all will cross the human placenta. There are no human pregnancy data for six of these agents and very limited data for flavoxate and oxybutynin. There is no evidence of embryo-fetal harm from these two drugs, but only one case involved exposure in the first trimester.

In seven of these drugs, the animal data suggested low risk. There was no embryo harm from doses that were equal to or less than 10 times the human dose based on body surface area (BSA) or area under the concentration curve (AUC). Solifenacin did cause embryo toxicity in pregnant mice. There was no embryo toxicity in pregnant rats and rabbits, but the maximum doses used were very low. Overall, the available data suggest that exposure to an antispasmodic in pregnancy is low risk for embryo, fetal, and newborn harm.
 

Urinary acidifiers

Ammonium chloride is a urinary acidifier as well as a respiratory expectorant. There is a large amount of data related to when the drug was used as an expectorant. There was no evidence that this use was associated with large categories of major or minor malformations. However, there were possible associations with three individual defects: inguinal hernia, cataract, and any benign tumor. No reports describing its use as a urinary acidifier have been located. When large amounts are consumed near term, the drug may cause acidosis in the mother and fetus. The molecular weight (about 53) suggests that it will cross the placenta.

Urinary alkalinizers

Potassium citrate (Urocit-K) is indicated for the management of renal tubular acidosis with calcium stones, hypocitraturic calcium oxalate with nephrolithiasis of any etiology, and uric acid lithiasis with or without calcium stones. The molecular weight (about 307) suggests it will cross the placenta. Only one case of its use in pregnancy has been located. The newborn had an unspecified defect but no other information was provided. The animal data in four species suggest low risk.

Urinary germicides

There are three urinary germicides: methenamine, methylene blue, and nitrofurantoin. Methenamine is available as methenamine mandelate (molecular weight abut 292) and methenamine hippurate (molecular weight about 319). Both are metabolized to formaldehyde (molecular weight about 30), the active agent. The molecular weights suggest that all will cross the placenta. The use of methenamine during pregnancy has been reported in more than 750 pregnancies. There have been no embryo or fetal adverse effects attributed to the drug.

The human data involving oral methylene blue, a weak urinary germicide, is limited to 55 exposures. There were three infants with birth defects (type not specified). Several reports have described the use of intra-amniotic injections to assist in the diagnosis of suspected membrane rupture. This use has resulted in newborns with hemolytic anemia, hyperbilirubinemia with or without Heinz body formation, blue staining of the skin, and methemoglobinemia. Fetal deaths have also been described. Recommendations to avoid the intra-amniotic use of methylene blue were issued more than 10 years ago. Moreover, the use of oral methylene blue as a urinary germicide is no longer recommended.

The low molecular weight (about 238) of nitrofurantoin suggests that it will cross the placenta. It is commonly used in pregnancy for the treatment or prophylaxis of urinary tract infections. The large amount of human data indicates that the risk of drug-induced birth defects is low. Several cohort studies have found no increased risk for birth defects. However, some case-control studies have found increased risks for hypoplastic left heart syndrome and oral clefts. A 2015 review concluded that this difference was due to the increased sensitivity of case-control studies to detect adverse effects (J Obstet Gynaecol Can. 2015 Feb;37[2]:150-6).

Use of the drug close to term may cause hemolytic anemia in newborns who are glucose-6-phosphate dehydrogenase (G6PD) deficient. Although rare, this may also occur in newborns who are not G6PD deficient. The best course is to avoid use of the drug close to delivery. As for use of the drug in the first trimester, ACOG’s Committee on Obstetric Practice stated in Committee Opinion No. 717 that nitrofurantoin was still thought to be appropriate when no other suitable alternative antibiotics were available (Obstet Gynecol. 2017 Sept;130[3]:666-7).
 

Breastfeeding

Except for methenamine and nitrofurantoin, there are no data related to the use of the urinary tract drugs during breastfeeding. Peak levels of methenamine occur at 1 hour, but no reports of adverse effects on nursing infants have been located. Several reports have described the use of nitrofurantoin during breastfeeding. Minor diarrhea was noted in two infants. However, breastfeeding an infant with G6PD deficiency could lead to hemolytic anemia.

Phenazopyridine should be used with caution especially for an infant younger than 1 month or with G6PD deficiency because of the risk for methemoglobinemia, sulfhemoglobinemia, and hemolytic anemia.

Although there have been no reports of the use of mirabegron during lactation, the characteristics of the drug – low molecular weight (about 397), long elimination half life (50 hours), and moderate plasma protein binding (about 71%) – suggest that the drug will be excreted into milk, potentially in clinically significant amounts. There is also concern with use of tolterodine (molecular weight about 476) because both the primary drug and its equipotent metabolite may be excreted into milk.
 

Mr. Briggs is a clinical professor of pharmacy at the University of California, San Francisco, and an adjunct professor of pharmacy at the University of Southern California, Los Angeles, as well as at Washington State University, Spokane. He coauthored “Drugs in Pregnancy and Lactation” and coedited “Diseases, Complications, and Drug Therapy in Obstetrics.” He reported having no relevant financial disclosures.

A woman with a transplanted uterus gave birth to a live baby boy in Dallas, the first birth from a transplanted uterus in the United States. It is also the first birth resulting from uterine transplantation to be performed outside of Sweden, where a total of eight births have occurred.

“This really confirms that this is doable, that it can be replicated,” said Giuliano Testa, MD, chief of abdominal transplantation at Baylor University Medical Center, Dallas, during a press conference to discuss the birth.

With time, Dr. Testa said in an interview, he foresees uterine transplantation becoming a realistic alternative for some women. “It’s a great solution for the woman who really wants to carry her own pregnancy.”

“This is the best of academic medicine,” Dr. Testa said of the international collaboration and transparency among investigators working in the nascent field. “The communication is constant; we learn from each other ... I am very excited about what will come in the future.”

In order to protect the privacy of the patient and her family, physicians did not disclose the patient’s name, location, or the exact date of the birth. The patient also did not wish to share the infant’s gestational age at birth or birth weight, or whether the uterus had been removed after the birth. Transplanted uteri are meant to be removed after one or two pregnancies, so the recipient doesn’t have to be on lifelong immunosuppression once the desired pregnancies have been achieved.

However, during the press conference, the surgical team shared that the mother is home and doing well, and the infant is on room air and feeding well. A video of the birth shown at the press conference showed a vernix-covered baby who began crying vigorously even before his feet were delivered during the cesarean delivery.

The transplantation, pregnancy via in vitro fertilization, and subsequent birth were accomplished as part of a 10-patient clinical trial of uterine transplantation at Baylor University Medical Center. Women aged 20-35 years with absolute uterine factor infertility, such as those with congenitally absent uteri, were eligible to participate. Donors must have had one full-term delivery and may be aged 30-65 years; menopause does not render a uterus incapable of carrying a pregnancy. Donors are able to retain their ovaries.

Another study participant at Baylor is late into her pregnancy as well, Dr. Testa said.

The extensive screening process for uterus donation ensures that the team is using “a good organ from a good donor,” said Liza Johannesson, MD, PhD. In an interview, she said that the harvest is now about a 4-5 hour open procedure that takes the uterus, the cervix, and the very superior portion of the vagina, as well as the uterine arteries and veins out to the internal iliac bilaterally. The utero-ovarian veins also are harvested.

To date, the six women who have been donors in the Baylor program have not had serious complications and have returned to their previous level of function, said Dr. Johannesson, who came to Baylor from Sahlgrenska University Hospital’s successful uterine transplantation team in Gothenburg, Sweden.

Internationally, investigators have been working to reduce morbidity for women who donate their uterus. Since the vascular tree of the uterus must also be dissected and preserved during the organ harvesting procedure, operative time is longer than for a simple hysterectomy, and there’s increased risk of urinary dysfunction because of the extensive dissection, Antonio R. Gargiulo, MD, said in an interview.*

Dr. Gargiulo, medical director of the center for robotic surgery at Brigham and Women’s Hospital, Boston, said that the first few uterine harvest procedures took much longer, up to 10 hours. But, he said, the vascular harvest “is well within the capability of the best gynecologic oncology surgeons,” and newer techniques may further reduce the donor morbidity.

Using the utero-ovarian vein as the primary outflow tract is “a promising modification of this operation” that may be the “technical key to making this procedure the least morbid possible,” said Dr. Gargiulo, a reproductive endocrinologist who is involved with the development of a uterine transplantation program at the Brigham and Women’s Hospital.

Dr. Johannesson said that the Baylor team currently dissects the entire uterine vascular tree and reanastomoses what vessels they can. She pointed out that even with the best imaging techniques, it can be difficult to ascertain the best vessels until the surgery’s actually being performed.

All of the surgeons interviewed emphasized that each procedure represents an opportunity for growth in a young field with a steep learning curve. They expect ongoing technical advances, including the use of robotic surgery, to reduce operative time and lessen morbidity.

It’s worth pressing on in this field for the sake of the patients, said Dr. Testa, speaking for his transplant team. “We are all humbled by the depth of the desire of a woman to carry her own pregnancy.”

Dr. Johannesson said that she hopes that today when gynecologists talk to teenage patients who have absolute uterine infertility, they will be offering a message of hope. “When they meet young women, they should tell them that they shouldn’t stop hoping,” she said. “There is hope that they will be able to carry their own pregnancy.”

Dr. Gargiulo has been a paid consultant for Kawasaki Robotics and OmniGuide. Dr. Testa and Dr. Johannesson reported that they had no relevant conflicts of interest.
 

*Correction, 12/12/17: The reason for the increased risk of urinary dysfunction was misstated.

[email protected]
On Twitter @karioakes

A woman with a transplanted uterus gave birth to a live baby boy in Dallas, the first birth from a transplanted uterus in the United States. It is also the first birth resulting from uterine transplantation to be performed outside of Sweden, where a total of eight births have occurred.

“This really confirms that this is doable, that it can be replicated,” said Giuliano Testa, MD, chief of abdominal transplantation at Baylor University Medical Center, Dallas, during a press conference to discuss the birth.

With time, Dr. Testa said in an interview, he foresees uterine transplantation becoming a realistic alternative for some women. “It’s a great solution for the woman who really wants to carry her own pregnancy.”

“This is the best of academic medicine,” Dr. Testa said of the international collaboration and transparency among investigators working in the nascent field. “The communication is constant; we learn from each other ... I am very excited about what will come in the future.”

In order to protect the privacy of the patient and her family, physicians did not disclose the patient’s name, location, or the exact date of the birth. The patient also did not wish to share the infant’s gestational age at birth or birth weight, or whether the uterus had been removed after the birth. Transplanted uteri are meant to be removed after one or two pregnancies, so the recipient doesn’t have to be on lifelong immunosuppression once the desired pregnancies have been achieved.

However, during the press conference, the surgical team shared that the mother is home and doing well, and the infant is on room air and feeding well. A video of the birth shown at the press conference showed a vernix-covered baby who began crying vigorously even before his feet were delivered during the cesarean delivery.

The transplantation, pregnancy via in vitro fertilization, and subsequent birth were accomplished as part of a 10-patient clinical trial of uterine transplantation at Baylor University Medical Center. Women aged 20-35 years with absolute uterine factor infertility, such as those with congenitally absent uteri, were eligible to participate. Donors must have had one full-term delivery and may be aged 30-65 years; menopause does not render a uterus incapable of carrying a pregnancy. Donors are able to retain their ovaries.

Another study participant at Baylor is late into her pregnancy as well, Dr. Testa said.

The extensive screening process for uterus donation ensures that the team is using “a good organ from a good donor,” said Liza Johannesson, MD, PhD. In an interview, she said that the harvest is now about a 4-5 hour open procedure that takes the uterus, the cervix, and the very superior portion of the vagina, as well as the uterine arteries and veins out to the internal iliac bilaterally. The utero-ovarian veins also are harvested.

To date, the six women who have been donors in the Baylor program have not had serious complications and have returned to their previous level of function, said Dr. Johannesson, who came to Baylor from Sahlgrenska University Hospital’s successful uterine transplantation team in Gothenburg, Sweden.

Internationally, investigators have been working to reduce morbidity for women who donate their uterus. Since the vascular tree of the uterus must also be dissected and preserved during the organ harvesting procedure, operative time is longer than for a simple hysterectomy, and there’s increased risk of urinary dysfunction because of the extensive dissection, Antonio R. Gargiulo, MD, said in an interview.*

Dr. Gargiulo, medical director of the center for robotic surgery at Brigham and Women’s Hospital, Boston, said that the first few uterine harvest procedures took much longer, up to 10 hours. But, he said, the vascular harvest “is well within the capability of the best gynecologic oncology surgeons,” and newer techniques may further reduce the donor morbidity.

Using the utero-ovarian vein as the primary outflow tract is “a promising modification of this operation” that may be the “technical key to making this procedure the least morbid possible,” said Dr. Gargiulo, a reproductive endocrinologist who is involved with the development of a uterine transplantation program at the Brigham and Women’s Hospital.

Dr. Johannesson said that the Baylor team currently dissects the entire uterine vascular tree and reanastomoses what vessels they can. She pointed out that even with the best imaging techniques, it can be difficult to ascertain the best vessels until the surgery’s actually being performed.

All of the surgeons interviewed emphasized that each procedure represents an opportunity for growth in a young field with a steep learning curve. They expect ongoing technical advances, including the use of robotic surgery, to reduce operative time and lessen morbidity.

It’s worth pressing on in this field for the sake of the patients, said Dr. Testa, speaking for his transplant team. “We are all humbled by the depth of the desire of a woman to carry her own pregnancy.”

Dr. Johannesson said that she hopes that today when gynecologists talk to teenage patients who have absolute uterine infertility, they will be offering a message of hope. “When they meet young women, they should tell them that they shouldn’t stop hoping,” she said. “There is hope that they will be able to carry their own pregnancy.”

Dr. Gargiulo has been a paid consultant for Kawasaki Robotics and OmniGuide. Dr. Testa and Dr. Johannesson reported that they had no relevant conflicts of interest.
 

*Correction, 12/12/17: The reason for the increased risk of urinary dysfunction was misstated.

[email protected]
On Twitter @karioakes

A woman with a transplanted uterus gave birth to a live baby boy in Dallas, the first birth from a transplanted uterus in the United States. It is also the first birth resulting from uterine transplantation to be performed outside of Sweden, where a total of eight births have occurred.

“This really confirms that this is doable, that it can be replicated,” said Giuliano Testa, MD, chief of abdominal transplantation at Baylor University Medical Center, Dallas, during a press conference to discuss the birth.

With time, Dr. Testa said in an interview, he foresees uterine transplantation becoming a realistic alternative for some women. “It’s a great solution for the woman who really wants to carry her own pregnancy.”

“This is the best of academic medicine,” Dr. Testa said of the international collaboration and transparency among investigators working in the nascent field. “The communication is constant; we learn from each other ... I am very excited about what will come in the future.”

In order to protect the privacy of the patient and her family, physicians did not disclose the patient’s name, location, or the exact date of the birth. The patient also did not wish to share the infant’s gestational age at birth or birth weight, or whether the uterus had been removed after the birth. Transplanted uteri are meant to be removed after one or two pregnancies, so the recipient doesn’t have to be on lifelong immunosuppression once the desired pregnancies have been achieved.

However, during the press conference, the surgical team shared that the mother is home and doing well, and the infant is on room air and feeding well. A video of the birth shown at the press conference showed a vernix-covered baby who began crying vigorously even before his feet were delivered during the cesarean delivery.

The transplantation, pregnancy via in vitro fertilization, and subsequent birth were accomplished as part of a 10-patient clinical trial of uterine transplantation at Baylor University Medical Center. Women aged 20-35 years with absolute uterine factor infertility, such as those with congenitally absent uteri, were eligible to participate. Donors must have had one full-term delivery and may be aged 30-65 years; menopause does not render a uterus incapable of carrying a pregnancy. Donors are able to retain their ovaries.

Another study participant at Baylor is late into her pregnancy as well, Dr. Testa said.

The extensive screening process for uterus donation ensures that the team is using “a good organ from a good donor,” said Liza Johannesson, MD, PhD. In an interview, she said that the harvest is now about a 4-5 hour open procedure that takes the uterus, the cervix, and the very superior portion of the vagina, as well as the uterine arteries and veins out to the internal iliac bilaterally. The utero-ovarian veins also are harvested.

To date, the six women who have been donors in the Baylor program have not had serious complications and have returned to their previous level of function, said Dr. Johannesson, who came to Baylor from Sahlgrenska University Hospital’s successful uterine transplantation team in Gothenburg, Sweden.

Internationally, investigators have been working to reduce morbidity for women who donate their uterus. Since the vascular tree of the uterus must also be dissected and preserved during the organ harvesting procedure, operative time is longer than for a simple hysterectomy, and there’s increased risk of urinary dysfunction because of the extensive dissection, Antonio R. Gargiulo, MD, said in an interview.*

Dr. Gargiulo, medical director of the center for robotic surgery at Brigham and Women’s Hospital, Boston, said that the first few uterine harvest procedures took much longer, up to 10 hours. But, he said, the vascular harvest “is well within the capability of the best gynecologic oncology surgeons,” and newer techniques may further reduce the donor morbidity.

Using the utero-ovarian vein as the primary outflow tract is “a promising modification of this operation” that may be the “technical key to making this procedure the least morbid possible,” said Dr. Gargiulo, a reproductive endocrinologist who is involved with the development of a uterine transplantation program at the Brigham and Women’s Hospital.

Dr. Johannesson said that the Baylor team currently dissects the entire uterine vascular tree and reanastomoses what vessels they can. She pointed out that even with the best imaging techniques, it can be difficult to ascertain the best vessels until the surgery’s actually being performed.

All of the surgeons interviewed emphasized that each procedure represents an opportunity for growth in a young field with a steep learning curve. They expect ongoing technical advances, including the use of robotic surgery, to reduce operative time and lessen morbidity.

It’s worth pressing on in this field for the sake of the patients, said Dr. Testa, speaking for his transplant team. “We are all humbled by the depth of the desire of a woman to carry her own pregnancy.”

Dr. Johannesson said that she hopes that today when gynecologists talk to teenage patients who have absolute uterine infertility, they will be offering a message of hope. “When they meet young women, they should tell them that they shouldn’t stop hoping,” she said. “There is hope that they will be able to carry their own pregnancy.”

Dr. Gargiulo has been a paid consultant for Kawasaki Robotics and OmniGuide. Dr. Testa and Dr. Johannesson reported that they had no relevant conflicts of interest.
 

*Correction, 12/12/17: The reason for the increased risk of urinary dysfunction was misstated.

[email protected]
On Twitter @karioakes

SAN ANTONIO – An easy-to-use risk stratification tool accurately predicted which pregnancies of unknown location were ectopic pregnancies by using a model validated by retrospective chart review.

Reeva Makhijani, MD, and her colleagues built the tool using a composite of risk factors to create a “generalized additive model,” or GAM, in combination with beta HCG levels. They presented the results during a poster session at the annual meeting of the American Society for Reproductive Medicine.

The model showed that a prior history of ectopic pregnancy (EP) (P = .0045), a history of pelvic surgery (P = .397), and a presentation of vaginal bleeding (P = .0003) all significantly increased the risk of EP.

Another statistical measure, the area under the receiver operating curve (AUC), helps estimate the likelihood of EP according to beta-HCG levels. When the initial beta-HCG was considered together with the ratio of the initial beta HCG to the presenting beta-HCG, the AUC was 0.889. For the initial beta-HCG level alone, the AUC was 0.793, while for the ratio alone, the AUC was 0.88. Higher AUC figures indicate more predictive power.

Dr. Makhijani, an ob.gyn. resident physician at Brown University, Providence, R.I., and her colleagues have built a prototype of a computer application that calculates risk of EP when the significant risk factors and lab values are entered.

After reviewing the electronic medical records of 800 patients who had pregnancies of unknown location (PUL), in the final analysis Dr. Makhijani and her coauthors included 398 patients whose medical histories allowed assessment of risk factors and whose record included at least two beta-HCG values taken 36-72 hours apart. The investigators also excluded patients with molar pregnancies, ruptured EPs, or who had undergone surgery before a second beta-HCG was obtained.

Of the 398 patients, 40 (10%) were eventually found to have EP, while 168 (42%) had an intrauterine pregnancy, and 190 (48%) were diagnosed with spontaneous abortion.

The patients were about 27 years old on average, and just over half (n = 224) were parous. Vaginal bleeding was a presenting sign in 233 patients, and 284 had abdominal pain. Of those with EP, 34 of 40 had vaginal bleeding, and 25 of 40 had abdominal pain.

In addition to the three factors found to have significant association with EP, the investigators initially considered a number of other patient characteristics, including age, parity, and presentation with abdominal pain. Additional risk factors examined included history of infertility, pelvic inflammatory disease, sexually transmitted disease, intrauterine device placement, and diethylstilbestrol (DES) exposure. None of these were significantly associated with risk of EP.

“Our model can be translated into an easy-to-use risk stratification tool that can accurately predict the risk of EP,” said Dr. Makhijani and her coauthors. “This tool could potentially be used by clinicians and ob.gyn. residencies nationally as [pregnancies of unknown location] are a very common management scenario.”

Dr. Makhijani reported having no disclosures and no outside sources of funding.

[email protected]

On Twitter @karioakes

SAN ANTONIO – An easy-to-use risk stratification tool accurately predicted which pregnancies of unknown location were ectopic pregnancies by using a model validated by retrospective chart review.

Reeva Makhijani, MD, and her colleagues built the tool using a composite of risk factors to create a “generalized additive model,” or GAM, in combination with beta HCG levels. They presented the results during a poster session at the annual meeting of the American Society for Reproductive Medicine.

The model showed that a prior history of ectopic pregnancy (EP) (P = .0045), a history of pelvic surgery (P = .397), and a presentation of vaginal bleeding (P = .0003) all significantly increased the risk of EP.

Another statistical measure, the area under the receiver operating curve (AUC), helps estimate the likelihood of EP according to beta-HCG levels. When the initial beta-HCG was considered together with the ratio of the initial beta HCG to the presenting beta-HCG, the AUC was 0.889. For the initial beta-HCG level alone, the AUC was 0.793, while for the ratio alone, the AUC was 0.88. Higher AUC figures indicate more predictive power.

Dr. Makhijani, an ob.gyn. resident physician at Brown University, Providence, R.I., and her colleagues have built a prototype of a computer application that calculates risk of EP when the significant risk factors and lab values are entered.

After reviewing the electronic medical records of 800 patients who had pregnancies of unknown location (PUL), in the final analysis Dr. Makhijani and her coauthors included 398 patients whose medical histories allowed assessment of risk factors and whose record included at least two beta-HCG values taken 36-72 hours apart. The investigators also excluded patients with molar pregnancies, ruptured EPs, or who had undergone surgery before a second beta-HCG was obtained.

Of the 398 patients, 40 (10%) were eventually found to have EP, while 168 (42%) had an intrauterine pregnancy, and 190 (48%) were diagnosed with spontaneous abortion.

The patients were about 27 years old on average, and just over half (n = 224) were parous. Vaginal bleeding was a presenting sign in 233 patients, and 284 had abdominal pain. Of those with EP, 34 of 40 had vaginal bleeding, and 25 of 40 had abdominal pain.

In addition to the three factors found to have significant association with EP, the investigators initially considered a number of other patient characteristics, including age, parity, and presentation with abdominal pain. Additional risk factors examined included history of infertility, pelvic inflammatory disease, sexually transmitted disease, intrauterine device placement, and diethylstilbestrol (DES) exposure. None of these were significantly associated with risk of EP.

“Our model can be translated into an easy-to-use risk stratification tool that can accurately predict the risk of EP,” said Dr. Makhijani and her coauthors. “This tool could potentially be used by clinicians and ob.gyn. residencies nationally as [pregnancies of unknown location] are a very common management scenario.”

Dr. Makhijani reported having no disclosures and no outside sources of funding.

[email protected]

On Twitter @karioakes

SAN ANTONIO – An easy-to-use risk stratification tool accurately predicted which pregnancies of unknown location were ectopic pregnancies by using a model validated by retrospective chart review.

Reeva Makhijani, MD, and her colleagues built the tool using a composite of risk factors to create a “generalized additive model,” or GAM, in combination with beta HCG levels. They presented the results during a poster session at the annual meeting of the American Society for Reproductive Medicine.

The model showed that a prior history of ectopic pregnancy (EP) (P = .0045), a history of pelvic surgery (P = .397), and a presentation of vaginal bleeding (P = .0003) all significantly increased the risk of EP.

Another statistical measure, the area under the receiver operating curve (AUC), helps estimate the likelihood of EP according to beta-HCG levels. When the initial beta-HCG was considered together with the ratio of the initial beta HCG to the presenting beta-HCG, the AUC was 0.889. For the initial beta-HCG level alone, the AUC was 0.793, while for the ratio alone, the AUC was 0.88. Higher AUC figures indicate more predictive power.

Dr. Makhijani, an ob.gyn. resident physician at Brown University, Providence, R.I., and her colleagues have built a prototype of a computer application that calculates risk of EP when the significant risk factors and lab values are entered.

After reviewing the electronic medical records of 800 patients who had pregnancies of unknown location (PUL), in the final analysis Dr. Makhijani and her coauthors included 398 patients whose medical histories allowed assessment of risk factors and whose record included at least two beta-HCG values taken 36-72 hours apart. The investigators also excluded patients with molar pregnancies, ruptured EPs, or who had undergone surgery before a second beta-HCG was obtained.

Of the 398 patients, 40 (10%) were eventually found to have EP, while 168 (42%) had an intrauterine pregnancy, and 190 (48%) were diagnosed with spontaneous abortion.

The patients were about 27 years old on average, and just over half (n = 224) were parous. Vaginal bleeding was a presenting sign in 233 patients, and 284 had abdominal pain. Of those with EP, 34 of 40 had vaginal bleeding, and 25 of 40 had abdominal pain.

In addition to the three factors found to have significant association with EP, the investigators initially considered a number of other patient characteristics, including age, parity, and presentation with abdominal pain. Additional risk factors examined included history of infertility, pelvic inflammatory disease, sexually transmitted disease, intrauterine device placement, and diethylstilbestrol (DES) exposure. None of these were significantly associated with risk of EP.

“Our model can be translated into an easy-to-use risk stratification tool that can accurately predict the risk of EP,” said Dr. Makhijani and her coauthors. “This tool could potentially be used by clinicians and ob.gyn. residencies nationally as [pregnancies of unknown location] are a very common management scenario.”

Dr. Makhijani reported having no disclosures and no outside sources of funding.

[email protected]

On Twitter @karioakes

Research on pregnancy is now being crowdsourced, with pregnant women being asked in a new federal research project to “tell researchers and health care providers what pregnancy is really like.”

The project, PregSource, was launched in November by the National Institute of Child Health and Human Development (NICHD). Women who join PregSource (https://pregsource.nih.gov) are asked to chart changes to their weight, sleep, mood, morning sickness, and physical activity and to answer monthly online surveys about their pregnancy experiences, symptoms, and complications. It is hoped that resulting de-identified data will help inform future studies and improve maternal care, NICHD officials said.

digitalskillet/Thinkstock

“We spend a lot of time talking about the complications of pregnancy, but we don’t know a whole lot about the baseline experiences. . .the experiential trends of pregnancy” such as how many women experience morning sickness and for how long, and how pregnancy affects sleep patterns, she said.

By crowdsourcing to pregnant women themselves – by asking them to voluntarily offer data and make observations, “we’re researching on a large scale and doing so relatively cost effectively,” said Dr. Signore, an ob.gyn. “Women who are interested in contributing to science can [do so] on their own terms. They can visit PregSource on their own time and enter as much data as they want.”

Hal E. Lawrence III, MD, executive vice president and chief executive officer of the American College of Obstetricians and Gynecologists, called the project “groundbreaking” and said that NICHD should have “no problem” meeting its initial target of 100,000 pregnant women. “This is different from the other pregnancy apps,” he said. “This is more of a reporting and an informative [site], which the others aren’t.”

ACOG is one of about a dozen partnering organizations – along with the American Academy of Pediatrics and the American College of Nurse-Midwives – that have worked with NICHD on shaping the project and contributing content for a resource library that PregSource participants will have access to.

The project is currently in a “soft-launch phase,” Dr. Signore said, and will step up its outreach to women and providers in January.

Along with the current series of “trackers” and monthly questionnaires (in addition to questionnaires about prepregnancy health), women who indicate that they have physical disabilities or certain complications or conditions such as diabetes will be asked to participate in additional information-gathering modules. And once the project has amassed enough data, women will be able to compare specific experiences with those of other participants.

“A woman who’s 5 months’ pregnant and completes questions on nausea and vomiting, say, can click a button and see how everyone else who’s been in PregSource at this time has answered that question,” Dr. Signore said. “Or a woman who indicates she’s having a lot of heartburn at 27 weeks can learn about how many other women are having heartburn. We think this will be valuable for women, because [they’re] always wondering, ‘Is my experience unique?’ ”

NICHD officials said they hope women will share with their ob.gyns. or other providers the charts from their PregSource trackers, such as those plotting the individual’s weight gain against Institute of Medicine-recommended weight gain ranges. “We like to think that PregSource will promote conversations and shared decision making. . .and hopefully that it will improve that individual woman’s outcomes,” Dr. Signore said.

Indeed, said Uma M. Reddy, MD, MPH, project scientist for the NICHD’s Maternal-Fetal Medicine Units (MFMU) Network, women who use PregSource’s trackers should be “more in tune with their pregnancies” and with staying healthy. She and other experts touted PregSource at the recent biennial meeting of the Diabetes in Pregnancy Study Group.

The NICHD also plans to gently nudge women toward any relevant clinical studies underway in their locales “by simply notifying the women and making the information available to them,” Dr. Signore said. In addition, the project will invite women to track their experiences for several years after childbirth so more data can be generated on associations between pregnancy and child and maternal health. “Just as with the whole project, we’re trying to take into account the benefit-burden ratio and hope that women will continue to see value,” she said.

The NICHD-sponsored project will not sell or share any personal information to a third party, and participants will not receive any ads or product announcements. Data from the project – all of it de-identified – will be shared with approved researchers for their own analyses.

“We see it being already equipped to answer [existing] questions and to probe relationships” between pregnancy characteristics and complications, for instance, Dr. Signore said. “But it also could be a hypothesis-generating resource.”

A Spanish version will come “once we know we’ve optimized functionality and syntax,” she said. And overall, the NICHD is ready for growth, both in numbers of participants and in content.

ACOG is rooting for its success, Dr. Lawrence said. “We’ll have to wait and see how the results help us, but I’ll tell you one thing, having no data will never help us.”

Research on pregnancy is now being crowdsourced, with pregnant women being asked in a new federal research project to “tell researchers and health care providers what pregnancy is really like.”

The project, PregSource, was launched in November by the National Institute of Child Health and Human Development (NICHD). Women who join PregSource (https://pregsource.nih.gov) are asked to chart changes to their weight, sleep, mood, morning sickness, and physical activity and to answer monthly online surveys about their pregnancy experiences, symptoms, and complications. It is hoped that resulting de-identified data will help inform future studies and improve maternal care, NICHD officials said.

digitalskillet/Thinkstock

“We spend a lot of time talking about the complications of pregnancy, but we don’t know a whole lot about the baseline experiences. . .the experiential trends of pregnancy” such as how many women experience morning sickness and for how long, and how pregnancy affects sleep patterns, she said.

By crowdsourcing to pregnant women themselves – by asking them to voluntarily offer data and make observations, “we’re researching on a large scale and doing so relatively cost effectively,” said Dr. Signore, an ob.gyn. “Women who are interested in contributing to science can [do so] on their own terms. They can visit PregSource on their own time and enter as much data as they want.”

Hal E. Lawrence III, MD, executive vice president and chief executive officer of the American College of Obstetricians and Gynecologists, called the project “groundbreaking” and said that NICHD should have “no problem” meeting its initial target of 100,000 pregnant women. “This is different from the other pregnancy apps,” he said. “This is more of a reporting and an informative [site], which the others aren’t.”

ACOG is one of about a dozen partnering organizations – along with the American Academy of Pediatrics and the American College of Nurse-Midwives – that have worked with NICHD on shaping the project and contributing content for a resource library that PregSource participants will have access to.

The project is currently in a “soft-launch phase,” Dr. Signore said, and will step up its outreach to women and providers in January.

Along with the current series of “trackers” and monthly questionnaires (in addition to questionnaires about prepregnancy health), women who indicate that they have physical disabilities or certain complications or conditions such as diabetes will be asked to participate in additional information-gathering modules. And once the project has amassed enough data, women will be able to compare specific experiences with those of other participants.

“A woman who’s 5 months’ pregnant and completes questions on nausea and vomiting, say, can click a button and see how everyone else who’s been in PregSource at this time has answered that question,” Dr. Signore said. “Or a woman who indicates she’s having a lot of heartburn at 27 weeks can learn about how many other women are having heartburn. We think this will be valuable for women, because [they’re] always wondering, ‘Is my experience unique?’ ”

NICHD officials said they hope women will share with their ob.gyns. or other providers the charts from their PregSource trackers, such as those plotting the individual’s weight gain against Institute of Medicine-recommended weight gain ranges. “We like to think that PregSource will promote conversations and shared decision making. . .and hopefully that it will improve that individual woman’s outcomes,” Dr. Signore said.

Indeed, said Uma M. Reddy, MD, MPH, project scientist for the NICHD’s Maternal-Fetal Medicine Units (MFMU) Network, women who use PregSource’s trackers should be “more in tune with their pregnancies” and with staying healthy. She and other experts touted PregSource at the recent biennial meeting of the Diabetes in Pregnancy Study Group.

The NICHD also plans to gently nudge women toward any relevant clinical studies underway in their locales “by simply notifying the women and making the information available to them,” Dr. Signore said. In addition, the project will invite women to track their experiences for several years after childbirth so more data can be generated on associations between pregnancy and child and maternal health. “Just as with the whole project, we’re trying to take into account the benefit-burden ratio and hope that women will continue to see value,” she said.

The NICHD-sponsored project will not sell or share any personal information to a third party, and participants will not receive any ads or product announcements. Data from the project – all of it de-identified – will be shared with approved researchers for their own analyses.

“We see it being already equipped to answer [existing] questions and to probe relationships” between pregnancy characteristics and complications, for instance, Dr. Signore said. “But it also could be a hypothesis-generating resource.”

A Spanish version will come “once we know we’ve optimized functionality and syntax,” she said. And overall, the NICHD is ready for growth, both in numbers of participants and in content.

ACOG is rooting for its success, Dr. Lawrence said. “We’ll have to wait and see how the results help us, but I’ll tell you one thing, having no data will never help us.”

Research on pregnancy is now being crowdsourced, with pregnant women being asked in a new federal research project to “tell researchers and health care providers what pregnancy is really like.”

The project, PregSource, was launched in November by the National Institute of Child Health and Human Development (NICHD). Women who join PregSource (https://pregsource.nih.gov) are asked to chart changes to their weight, sleep, mood, morning sickness, and physical activity and to answer monthly online surveys about their pregnancy experiences, symptoms, and complications. It is hoped that resulting de-identified data will help inform future studies and improve maternal care, NICHD officials said.

digitalskillet/Thinkstock

“We spend a lot of time talking about the complications of pregnancy, but we don’t know a whole lot about the baseline experiences. . .the experiential trends of pregnancy” such as how many women experience morning sickness and for how long, and how pregnancy affects sleep patterns, she said.

By crowdsourcing to pregnant women themselves – by asking them to voluntarily offer data and make observations, “we’re researching on a large scale and doing so relatively cost effectively,” said Dr. Signore, an ob.gyn. “Women who are interested in contributing to science can [do so] on their own terms. They can visit PregSource on their own time and enter as much data as they want.”

Hal E. Lawrence III, MD, executive vice president and chief executive officer of the American College of Obstetricians and Gynecologists, called the project “groundbreaking” and said that NICHD should have “no problem” meeting its initial target of 100,000 pregnant women. “This is different from the other pregnancy apps,” he said. “This is more of a reporting and an informative [site], which the others aren’t.”

ACOG is one of about a dozen partnering organizations – along with the American Academy of Pediatrics and the American College of Nurse-Midwives – that have worked with NICHD on shaping the project and contributing content for a resource library that PregSource participants will have access to.

The project is currently in a “soft-launch phase,” Dr. Signore said, and will step up its outreach to women and providers in January.

Along with the current series of “trackers” and monthly questionnaires (in addition to questionnaires about prepregnancy health), women who indicate that they have physical disabilities or certain complications or conditions such as diabetes will be asked to participate in additional information-gathering modules. And once the project has amassed enough data, women will be able to compare specific experiences with those of other participants.

“A woman who’s 5 months’ pregnant and completes questions on nausea and vomiting, say, can click a button and see how everyone else who’s been in PregSource at this time has answered that question,” Dr. Signore said. “Or a woman who indicates she’s having a lot of heartburn at 27 weeks can learn about how many other women are having heartburn. We think this will be valuable for women, because [they’re] always wondering, ‘Is my experience unique?’ ”

NICHD officials said they hope women will share with their ob.gyns. or other providers the charts from their PregSource trackers, such as those plotting the individual’s weight gain against Institute of Medicine-recommended weight gain ranges. “We like to think that PregSource will promote conversations and shared decision making. . .and hopefully that it will improve that individual woman’s outcomes,” Dr. Signore said.

Indeed, said Uma M. Reddy, MD, MPH, project scientist for the NICHD’s Maternal-Fetal Medicine Units (MFMU) Network, women who use PregSource’s trackers should be “more in tune with their pregnancies” and with staying healthy. She and other experts touted PregSource at the recent biennial meeting of the Diabetes in Pregnancy Study Group.

The NICHD also plans to gently nudge women toward any relevant clinical studies underway in their locales “by simply notifying the women and making the information available to them,” Dr. Signore said. In addition, the project will invite women to track their experiences for several years after childbirth so more data can be generated on associations between pregnancy and child and maternal health. “Just as with the whole project, we’re trying to take into account the benefit-burden ratio and hope that women will continue to see value,” she said.

The NICHD-sponsored project will not sell or share any personal information to a third party, and participants will not receive any ads or product announcements. Data from the project – all of it de-identified – will be shared with approved researchers for their own analyses.

“We see it being already equipped to answer [existing] questions and to probe relationships” between pregnancy characteristics and complications, for instance, Dr. Signore said. “But it also could be a hypothesis-generating resource.”

A Spanish version will come “once we know we’ve optimized functionality and syntax,” she said. And overall, the NICHD is ready for growth, both in numbers of participants and in content.

ACOG is rooting for its success, Dr. Lawrence said. “We’ll have to wait and see how the results help us, but I’ll tell you one thing, having no data will never help us.”

Click here to read the supplement

Modern Day Laboring

Induction of Labor for Low-Risk Women: Is 39 the New 41?

Rohan D’Souza, MD, MSc, MRCOG; Errol R. Norwitz, MD, PhD, MBA 

Cervical Ripening in Alternative Settings: Balancing Logistics and Patient Care

Julian N. Robinson, MD; Sarah E. Little, MD

Click here to read the supplement

Click here to read the supplement

Modern Day Laboring

Induction of Labor for Low-Risk Women: Is 39 the New 41?

Rohan D’Souza, MD, MSc, MRCOG; Errol R. Norwitz, MD, PhD, MBA 

Cervical Ripening in Alternative Settings: Balancing Logistics and Patient Care

Julian N. Robinson, MD; Sarah E. Little, MD

Click here to read the supplement

Click here to read the supplement

Modern Day Laboring

Induction of Labor for Low-Risk Women: Is 39 the New 41?

Rohan D’Souza, MD, MSc, MRCOG; Errol R. Norwitz, MD, PhD, MBA 

Cervical Ripening in Alternative Settings: Balancing Logistics and Patient Care

Julian N. Robinson, MD; Sarah E. Little, MD

Click here to read the supplement

Prenatal vitamin D supplementation may reduce the risk of small for gestational age and early wheeze in infants, but most of the evidence comes from small, low-quality trials, according to a systematic review and meta-analysis.

Researchers reported on a meta-analysis of 43 randomized controlled trials, involving 8,406 participants, which examined the effects of vitamin D supplementation during pregnancy (BMJ. 2017;359:j5237. doi: 10.1136/bmj.j5237).

The most commonly reported outcomes involved fetal growth and preterm birth. A pooling of 37 comparisons suggested that vitamin D supplementation increased mean birth weight by an average of 58 g, compared with low-dose vitamin D, no vitamin D, or placebo.

Joss/Fotolia.com

Prenatal vitamin D supplementation may reduce the risk of small for gestational age and early wheeze in infants, but most of the evidence comes from small, low-quality trials, according to a systematic review and meta-analysis.

Researchers reported on a meta-analysis of 43 randomized controlled trials, involving 8,406 participants, which examined the effects of vitamin D supplementation during pregnancy (BMJ. 2017;359:j5237. doi: 10.1136/bmj.j5237).

The most commonly reported outcomes involved fetal growth and preterm birth. A pooling of 37 comparisons suggested that vitamin D supplementation increased mean birth weight by an average of 58 g, compared with low-dose vitamin D, no vitamin D, or placebo.

Joss/Fotolia.com

Prenatal vitamin D supplementation may reduce the risk of small for gestational age and early wheeze in infants, but most of the evidence comes from small, low-quality trials, according to a systematic review and meta-analysis.

Researchers reported on a meta-analysis of 43 randomized controlled trials, involving 8,406 participants, which examined the effects of vitamin D supplementation during pregnancy (BMJ. 2017;359:j5237. doi: 10.1136/bmj.j5237).

The most commonly reported outcomes involved fetal growth and preterm birth. A pooling of 37 comparisons suggested that vitamin D supplementation increased mean birth weight by an average of 58 g, compared with low-dose vitamin D, no vitamin D, or placebo.

Joss/Fotolia.com

Illustration: Kimberly Martens for OBG Management

All mammalian life is dependent on a continuous supply of molecular oxygen. Molecular oxygen is carried to cells by noncovalent binding to the iron moiety in the hemoglobin of red blood cells. It is utilized within cells by noncovalent binding to the iron moiety in various microsomal and mitochondrial proteins, including myoglobin and cytochromes. Consequently, to efficiently utilize molecular oxygen all mammalian life is dependent on an adequate supply of iron. Surprisingly, in an era of high technology precision medicine, many pregnant women are iron deficient, anemic, and not receiving adequate iron supplementation.

Iron deficiency is prevalent in women and pregnant women

Women often become iron deficient because of pregnancy or heavy menstrual bleeding. During pregnancy, maternal iron is provided to supply the needs of the fetus and placenta. Additional iron is needed to expand maternal red blood cell volume and replace iron lost due to bleeding at delivery. In the National Health and Nutrition Examination Survey (NHANES) of 1988–1994, 11% of women aged 16 to 49 years were iron deficient. By contrast, less than 1% of men aged 16 to 49 years were iron deficient.¹

In a NHANES study from 1999–2006, risk factors for iron deficiency included multiparity, current pregnancy, and regular menstrual cycles. Use of hormonal contraception reduced the rate of iron deficiency.² Using the same data, the prevalences of iron deficiency during the first, second, and third trimesters of pregnancy were reported to be 7%, 14%, and 30%, respectively.³ In addition to pregnancy and menstrual bleeding there are many other medical problems that may contribute to iron deficiency, including Helicobacter pylori (H pylori) infection, gastritis, celiac disease, and bariatric surgery.

Iron deficiency anemia may be associated with adverse pregnancy outcomes

In a retrospective study of 75,660 singleton pregnancies, 7,977 women were diagnosed with iron deficiency anemia when they were admitted for delivery. Compared with pregnant women without iron deficiency, the presence of iron deficiency increased the risk of:

• blood transfusion (odds ratio [OR], 5.48; 95% confidence interval [CI], 4.57–6.58)
• preterm delivery (OR, 1.54; 95% CI, 1.36–1.76)
• cesarean delivery (OR, 1.30; 95% CI, 1.13–1.49)
• 5-minute Apgar score <7 (OR, 2.21; 95% CI, 1.84–2.64)
• intensive care unit (ICU) admission (OR, 1.28; 95% CI, 1.20–1.39).⁴

In a systematic review and meta-analysis of 26 studies, maternal anemia (mostly iron deficiency anemia) was associated with a higher risk of low birth weight (relative risk [RR], 1.31; 95% CI, 1.13–1.51), preterm birth (RR, 1.63; 95% CI, 1.33–2.01), perinatal mortality (RR, 1.51; 95% CI, 1.30–1.76), and neonatal mortality (RR, 2.72; 95% CI, 1.19–6.25).⁵

In a clinical trial, pregnant women were randomly assigned to receive folic acid alone; folic acid plus iron supplements; or 15 vitamins and minerals, including folic acid and iron. At delivery, women in the iron-folic acid and the 15 vitamin and minerals groups had higher hemoglobin concentrations than the folic acid monotherapy group. Among 4,697 live births, women in the iron-folic acid group had significantly fewer preterm births (<34 weeks’ gestation) than the folic acid group (RR, 0.50; 95% CI, 0.27–0.94; P = .031).⁶ Data from additional randomized trials are needed to further clarify the effect of iron supplementation on obstetric outcomes.

Related article:
Treating polycystic ovary syndrome: Start using dual medical therapy

The diagnosis of iron deficiency is optimized by measuring serum ferritin

Serum ferritin measurement is an excellent test of iron deficiency. We recommend that all pregnant women have serum ferritin measured at the first prenatal visit and at the beginning of the third trimester to assess maternal iron stores. In pregnancy, the Centers for Disease Control and Prevention and the World Health Organization define anemia as a hemoglobin level of less than 11 g/dL or hematocrit less than 33% in the first and third trimesters. If a pregnant woman is not anemic, a serum ferritin level less than 15 ng/mL indicates iron deficiency.⁷ Some experts believe that in pregnant women who are not anemic, a serum ferritin level between 15 and 30 ng/mL may also indicate iron deficiency.⁸ If the pregnant woman is anemic and does not have another cause of the anemia, a serum ferritin level less than 40 ng/mL is indicative of iron deficiency.⁷

Ferritin is an acute phase reactant and levels may be falsely elevated due to chronic or acute inflammation, liver disease, renal failure, metabolic syndrome, or malignancy. Some women with iron deficiency due to bariatric surgery or malabsorption also have vitamin B12 and, less commonly, folate deficiency, which can contribute to the development of anemia (see “Diagnosis of anemia, iron deficiency, and iron deficiency anemia in pregnancy.”) Clinicians are often advised that a mean corpuscular volume demonstrating microcytosis is the “best test” to assess a patient for iron deficiency. However, reduced iron availability and low ferritin precede microcytosis. Hence microcytosis is a lagging measure and iron deficiency is diagnosed at an earlier stage by ferritin.

Dietary iron

Iron in food is present in heme (meat, poultry, fish) and non-heme forms (grains, plant food, supplements). Heme iron is better absorbed than non-heme iron. Foods rich in non-heme iron include spinach, lentils, prune juice, dried prunes, and fortified cereals. Absorption of non-heme iron can be increased by vitamin C or vitamin C–rich foods (broccoli, bell peppers, cantaloupe, grapefruit, oranges, strawberries, and tomatoes). Absorption of non-heme iron is reduced by consumption of dairy products, coffee, tea, and chocolate.

Oral iron treatment

Oral iron is an effective treatment for iron deficiency^9,10 and is inexpensive, safe, and widely available. The CDC recommends that all pregnant women take a 30 mg/day iron supplement, unless they have hemochromatosis.¹¹ For women with a low ferritin level and anemia, iron supplementation should be increased to 30 to 120 mg daily.¹¹ Not all prenatal vitamins contain iron; those that do typically contain 17 to 28 mg of elemental iron per dose.

Many pregnant women taking oral iron, especially at doses greater than 30 mg daily, have gastrointestinal side effects, which cause them to discontinue the iron therapy.¹² Taking iron supplementation on an intermittent basis may help to reduce gastrointestinal side effects and improve iron stores.¹³

In the past, a standard approach to the treatment of iron deficiency anemia was oral ferrous sulfate 325 mg (65 mg elemental iron) spaced in 3 doses each day for a total daily dose of 195 mg elemental iron. However, recent absorption studies concluded that maximal absorption of iron occurs with a dose in the range of 40 to 80 mg of elemental iron daily. Greater doses do not result in more iron absorption and are associated with more side effects.^14,15 (See “Start using alternate-day oral iron dosing, and stop using daily iron dosing.”)

Oral iron should not be taken in close approximation to the consumption of milk, cereals, tea, coffee, eggs, or calcium supplements. The absorption of oral iron is enhanced by the consumption of orange juice or 250 mg of vitamin C. Gastrointestinal side effects include nausea, flatulence, constipation, diarrhea, epigastric distress, and vomiting. If gastrointestinal side effects occur, interventions that might improve tolerability include: reduce the dose of iron or administer intermittently or use a low dose of oral iron, where dosing can be more easily titrated.

We re-check ferritin and hemoglobin levels 2 to 4 weeks after initiation of oral iron therapy and expect to see a hemoglobin rise of 1 g/dL if the therapy is effective.

Intravenous iron treatment

For women with iron deficiency anemia who cannot tolerate oral iron or in whom oral iron treatment has not resolved their anemia, intravenous (IV) iron treatment may be an optimal approach. Women in the third trimester of pregnancy with iron deficiency anemia have very little time to consume sufficient quantities of oral iron in food and supplements to restore their deficiency and reverse their anemia. Consequently, treatment with IV iron may be especially appropriate for women with iron deficiency anemia in the third trimester of pregnancy. Prior gastric surgery, including gastric bypass, results in reduced gastric acid production and causes severe impairment of intestinal absorption of iron. Patients with malabsorption syndromes, including celiac disease, also may have limited absorption of oral iron. These populations of pregnant women may particularly benefit from the use of IV iron. In pregnant women IV iron has fewer gastrointestinal side effects than oral iron.¹⁶

Many severely iron deficient patients need 1,000 mg of iron to resolve their deficit. In order to avoid giving multiple standard doses (200 mg per infusion, with 5 infusions over many days), some centers have explored the use of 1 large dose of IV iron (1,000 mg of low molecular weight iron dextran administered over 1 hour) (INFeD, Watson Pharma).^17–19 This is not a regimen that is specifically approved by the US Food and Drug Administration. An alternative regimen is to administer 750 mg of ferrous carboxymaltose (Injectafer, Luitpold Pharmaceuticals) over 15 minutes, which is an FDA-approved regimen.¹⁸ Many hematologists prefer to administer multiple smaller doses of iron. For example, in our practice, pregnant women are commonly treated with IV iron sucrose (300 mg) every 2 weeks for 3 doses. To increase access of pregnant women to IV iron treatment, obstetricians need to work with hematologists and infusion centers to create collaborative protocols to expeditiously treat women in the third trimester.

There is an epidemic of iron deficiency in pregnant women in the United States. In an era of high technology medicine, it is surprising that iron deficiency remains an unsolved obstetric problem in our country.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

Illustration: Kimberly Martens for OBG Management

All mammalian life is dependent on a continuous supply of molecular oxygen. Molecular oxygen is carried to cells by noncovalent binding to the iron moiety in the hemoglobin of red blood cells. It is utilized within cells by noncovalent binding to the iron moiety in various microsomal and mitochondrial proteins, including myoglobin and cytochromes. Consequently, to efficiently utilize molecular oxygen all mammalian life is dependent on an adequate supply of iron. Surprisingly, in an era of high technology precision medicine, many pregnant women are iron deficient, anemic, and not receiving adequate iron supplementation.

Iron deficiency is prevalent in women and pregnant women

Women often become iron deficient because of pregnancy or heavy menstrual bleeding. During pregnancy, maternal iron is provided to supply the needs of the fetus and placenta. Additional iron is needed to expand maternal red blood cell volume and replace iron lost due to bleeding at delivery. In the National Health and Nutrition Examination Survey (NHANES) of 1988–1994, 11% of women aged 16 to 49 years were iron deficient. By contrast, less than 1% of men aged 16 to 49 years were iron deficient.¹

In a NHANES study from 1999–2006, risk factors for iron deficiency included multiparity, current pregnancy, and regular menstrual cycles. Use of hormonal contraception reduced the rate of iron deficiency.² Using the same data, the prevalences of iron deficiency during the first, second, and third trimesters of pregnancy were reported to be 7%, 14%, and 30%, respectively.³ In addition to pregnancy and menstrual bleeding there are many other medical problems that may contribute to iron deficiency, including Helicobacter pylori (H pylori) infection, gastritis, celiac disease, and bariatric surgery.

Iron deficiency anemia may be associated with adverse pregnancy outcomes

In a retrospective study of 75,660 singleton pregnancies, 7,977 women were diagnosed with iron deficiency anemia when they were admitted for delivery. Compared with pregnant women without iron deficiency, the presence of iron deficiency increased the risk of:

• blood transfusion (odds ratio [OR], 5.48; 95% confidence interval [CI], 4.57–6.58)
• preterm delivery (OR, 1.54; 95% CI, 1.36–1.76)
• cesarean delivery (OR, 1.30; 95% CI, 1.13–1.49)
• 5-minute Apgar score <7 (OR, 2.21; 95% CI, 1.84–2.64)
• intensive care unit (ICU) admission (OR, 1.28; 95% CI, 1.20–1.39).⁴

In a systematic review and meta-analysis of 26 studies, maternal anemia (mostly iron deficiency anemia) was associated with a higher risk of low birth weight (relative risk [RR], 1.31; 95% CI, 1.13–1.51), preterm birth (RR, 1.63; 95% CI, 1.33–2.01), perinatal mortality (RR, 1.51; 95% CI, 1.30–1.76), and neonatal mortality (RR, 2.72; 95% CI, 1.19–6.25).⁵

In a clinical trial, pregnant women were randomly assigned to receive folic acid alone; folic acid plus iron supplements; or 15 vitamins and minerals, including folic acid and iron. At delivery, women in the iron-folic acid and the 15 vitamin and minerals groups had higher hemoglobin concentrations than the folic acid monotherapy group. Among 4,697 live births, women in the iron-folic acid group had significantly fewer preterm births (<34 weeks’ gestation) than the folic acid group (RR, 0.50; 95% CI, 0.27–0.94; P = .031).⁶ Data from additional randomized trials are needed to further clarify the effect of iron supplementation on obstetric outcomes.

Related article:
Treating polycystic ovary syndrome: Start using dual medical therapy

The diagnosis of iron deficiency is optimized by measuring serum ferritin

Serum ferritin measurement is an excellent test of iron deficiency. We recommend that all pregnant women have serum ferritin measured at the first prenatal visit and at the beginning of the third trimester to assess maternal iron stores. In pregnancy, the Centers for Disease Control and Prevention and the World Health Organization define anemia as a hemoglobin level of less than 11 g/dL or hematocrit less than 33% in the first and third trimesters. If a pregnant woman is not anemic, a serum ferritin level less than 15 ng/mL indicates iron deficiency.⁷ Some experts believe that in pregnant women who are not anemic, a serum ferritin level between 15 and 30 ng/mL may also indicate iron deficiency.⁸ If the pregnant woman is anemic and does not have another cause of the anemia, a serum ferritin level less than 40 ng/mL is indicative of iron deficiency.⁷

Ferritin is an acute phase reactant and levels may be falsely elevated due to chronic or acute inflammation, liver disease, renal failure, metabolic syndrome, or malignancy. Some women with iron deficiency due to bariatric surgery or malabsorption also have vitamin B12 and, less commonly, folate deficiency, which can contribute to the development of anemia (see “Diagnosis of anemia, iron deficiency, and iron deficiency anemia in pregnancy.”) Clinicians are often advised that a mean corpuscular volume demonstrating microcytosis is the “best test” to assess a patient for iron deficiency. However, reduced iron availability and low ferritin precede microcytosis. Hence microcytosis is a lagging measure and iron deficiency is diagnosed at an earlier stage by ferritin.

Dietary iron

Iron in food is present in heme (meat, poultry, fish) and non-heme forms (grains, plant food, supplements). Heme iron is better absorbed than non-heme iron. Foods rich in non-heme iron include spinach, lentils, prune juice, dried prunes, and fortified cereals. Absorption of non-heme iron can be increased by vitamin C or vitamin C–rich foods (broccoli, bell peppers, cantaloupe, grapefruit, oranges, strawberries, and tomatoes). Absorption of non-heme iron is reduced by consumption of dairy products, coffee, tea, and chocolate.

Oral iron treatment

Oral iron is an effective treatment for iron deficiency^9,10 and is inexpensive, safe, and widely available. The CDC recommends that all pregnant women take a 30 mg/day iron supplement, unless they have hemochromatosis.¹¹ For women with a low ferritin level and anemia, iron supplementation should be increased to 30 to 120 mg daily.¹¹ Not all prenatal vitamins contain iron; those that do typically contain 17 to 28 mg of elemental iron per dose.

Many pregnant women taking oral iron, especially at doses greater than 30 mg daily, have gastrointestinal side effects, which cause them to discontinue the iron therapy.¹² Taking iron supplementation on an intermittent basis may help to reduce gastrointestinal side effects and improve iron stores.¹³

In the past, a standard approach to the treatment of iron deficiency anemia was oral ferrous sulfate 325 mg (65 mg elemental iron) spaced in 3 doses each day for a total daily dose of 195 mg elemental iron. However, recent absorption studies concluded that maximal absorption of iron occurs with a dose in the range of 40 to 80 mg of elemental iron daily. Greater doses do not result in more iron absorption and are associated with more side effects.^14,15 (See “Start using alternate-day oral iron dosing, and stop using daily iron dosing.”)

Oral iron should not be taken in close approximation to the consumption of milk, cereals, tea, coffee, eggs, or calcium supplements. The absorption of oral iron is enhanced by the consumption of orange juice or 250 mg of vitamin C. Gastrointestinal side effects include nausea, flatulence, constipation, diarrhea, epigastric distress, and vomiting. If gastrointestinal side effects occur, interventions that might improve tolerability include: reduce the dose of iron or administer intermittently or use a low dose of oral iron, where dosing can be more easily titrated.

We re-check ferritin and hemoglobin levels 2 to 4 weeks after initiation of oral iron therapy and expect to see a hemoglobin rise of 1 g/dL if the therapy is effective.

Intravenous iron treatment

For women with iron deficiency anemia who cannot tolerate oral iron or in whom oral iron treatment has not resolved their anemia, intravenous (IV) iron treatment may be an optimal approach. Women in the third trimester of pregnancy with iron deficiency anemia have very little time to consume sufficient quantities of oral iron in food and supplements to restore their deficiency and reverse their anemia. Consequently, treatment with IV iron may be especially appropriate for women with iron deficiency anemia in the third trimester of pregnancy. Prior gastric surgery, including gastric bypass, results in reduced gastric acid production and causes severe impairment of intestinal absorption of iron. Patients with malabsorption syndromes, including celiac disease, also may have limited absorption of oral iron. These populations of pregnant women may particularly benefit from the use of IV iron. In pregnant women IV iron has fewer gastrointestinal side effects than oral iron.¹⁶

Many severely iron deficient patients need 1,000 mg of iron to resolve their deficit. In order to avoid giving multiple standard doses (200 mg per infusion, with 5 infusions over many days), some centers have explored the use of 1 large dose of IV iron (1,000 mg of low molecular weight iron dextran administered over 1 hour) (INFeD, Watson Pharma).^17–19 This is not a regimen that is specifically approved by the US Food and Drug Administration. An alternative regimen is to administer 750 mg of ferrous carboxymaltose (Injectafer, Luitpold Pharmaceuticals) over 15 minutes, which is an FDA-approved regimen.¹⁸ Many hematologists prefer to administer multiple smaller doses of iron. For example, in our practice, pregnant women are commonly treated with IV iron sucrose (300 mg) every 2 weeks for 3 doses. To increase access of pregnant women to IV iron treatment, obstetricians need to work with hematologists and infusion centers to create collaborative protocols to expeditiously treat women in the third trimester.

There is an epidemic of iron deficiency in pregnant women in the United States. In an era of high technology medicine, it is surprising that iron deficiency remains an unsolved obstetric problem in our country.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

Illustration: Kimberly Martens for OBG Management

All mammalian life is dependent on a continuous supply of molecular oxygen. Molecular oxygen is carried to cells by noncovalent binding to the iron moiety in the hemoglobin of red blood cells. It is utilized within cells by noncovalent binding to the iron moiety in various microsomal and mitochondrial proteins, including myoglobin and cytochromes. Consequently, to efficiently utilize molecular oxygen all mammalian life is dependent on an adequate supply of iron. Surprisingly, in an era of high technology precision medicine, many pregnant women are iron deficient, anemic, and not receiving adequate iron supplementation.

Iron deficiency is prevalent in women and pregnant women

Women often become iron deficient because of pregnancy or heavy menstrual bleeding. During pregnancy, maternal iron is provided to supply the needs of the fetus and placenta. Additional iron is needed to expand maternal red blood cell volume and replace iron lost due to bleeding at delivery. In the National Health and Nutrition Examination Survey (NHANES) of 1988–1994, 11% of women aged 16 to 49 years were iron deficient. By contrast, less than 1% of men aged 16 to 49 years were iron deficient.¹

In a NHANES study from 1999–2006, risk factors for iron deficiency included multiparity, current pregnancy, and regular menstrual cycles. Use of hormonal contraception reduced the rate of iron deficiency.² Using the same data, the prevalences of iron deficiency during the first, second, and third trimesters of pregnancy were reported to be 7%, 14%, and 30%, respectively.³ In addition to pregnancy and menstrual bleeding there are many other medical problems that may contribute to iron deficiency, including Helicobacter pylori (H pylori) infection, gastritis, celiac disease, and bariatric surgery.

Iron deficiency anemia may be associated with adverse pregnancy outcomes

In a retrospective study of 75,660 singleton pregnancies, 7,977 women were diagnosed with iron deficiency anemia when they were admitted for delivery. Compared with pregnant women without iron deficiency, the presence of iron deficiency increased the risk of:

• blood transfusion (odds ratio [OR], 5.48; 95% confidence interval [CI], 4.57–6.58)
• preterm delivery (OR, 1.54; 95% CI, 1.36–1.76)
• cesarean delivery (OR, 1.30; 95% CI, 1.13–1.49)
• 5-minute Apgar score <7 (OR, 2.21; 95% CI, 1.84–2.64)
• intensive care unit (ICU) admission (OR, 1.28; 95% CI, 1.20–1.39).⁴

In a systematic review and meta-analysis of 26 studies, maternal anemia (mostly iron deficiency anemia) was associated with a higher risk of low birth weight (relative risk [RR], 1.31; 95% CI, 1.13–1.51), preterm birth (RR, 1.63; 95% CI, 1.33–2.01), perinatal mortality (RR, 1.51; 95% CI, 1.30–1.76), and neonatal mortality (RR, 2.72; 95% CI, 1.19–6.25).⁵

In a clinical trial, pregnant women were randomly assigned to receive folic acid alone; folic acid plus iron supplements; or 15 vitamins and minerals, including folic acid and iron. At delivery, women in the iron-folic acid and the 15 vitamin and minerals groups had higher hemoglobin concentrations than the folic acid monotherapy group. Among 4,697 live births, women in the iron-folic acid group had significantly fewer preterm births (<34 weeks’ gestation) than the folic acid group (RR, 0.50; 95% CI, 0.27–0.94; P = .031).⁶ Data from additional randomized trials are needed to further clarify the effect of iron supplementation on obstetric outcomes.

Related article:
Treating polycystic ovary syndrome: Start using dual medical therapy

The diagnosis of iron deficiency is optimized by measuring serum ferritin

Serum ferritin measurement is an excellent test of iron deficiency. We recommend that all pregnant women have serum ferritin measured at the first prenatal visit and at the beginning of the third trimester to assess maternal iron stores. In pregnancy, the Centers for Disease Control and Prevention and the World Health Organization define anemia as a hemoglobin level of less than 11 g/dL or hematocrit less than 33% in the first and third trimesters. If a pregnant woman is not anemic, a serum ferritin level less than 15 ng/mL indicates iron deficiency.⁷ Some experts believe that in pregnant women who are not anemic, a serum ferritin level between 15 and 30 ng/mL may also indicate iron deficiency.⁸ If the pregnant woman is anemic and does not have another cause of the anemia, a serum ferritin level less than 40 ng/mL is indicative of iron deficiency.⁷

Ferritin is an acute phase reactant and levels may be falsely elevated due to chronic or acute inflammation, liver disease, renal failure, metabolic syndrome, or malignancy. Some women with iron deficiency due to bariatric surgery or malabsorption also have vitamin B12 and, less commonly, folate deficiency, which can contribute to the development of anemia (see “Diagnosis of anemia, iron deficiency, and iron deficiency anemia in pregnancy.”) Clinicians are often advised that a mean corpuscular volume demonstrating microcytosis is the “best test” to assess a patient for iron deficiency. However, reduced iron availability and low ferritin precede microcytosis. Hence microcytosis is a lagging measure and iron deficiency is diagnosed at an earlier stage by ferritin.

Dietary iron

Iron in food is present in heme (meat, poultry, fish) and non-heme forms (grains, plant food, supplements). Heme iron is better absorbed than non-heme iron. Foods rich in non-heme iron include spinach, lentils, prune juice, dried prunes, and fortified cereals. Absorption of non-heme iron can be increased by vitamin C or vitamin C–rich foods (broccoli, bell peppers, cantaloupe, grapefruit, oranges, strawberries, and tomatoes). Absorption of non-heme iron is reduced by consumption of dairy products, coffee, tea, and chocolate.

Oral iron treatment

Oral iron is an effective treatment for iron deficiency^9,10 and is inexpensive, safe, and widely available. The CDC recommends that all pregnant women take a 30 mg/day iron supplement, unless they have hemochromatosis.¹¹ For women with a low ferritin level and anemia, iron supplementation should be increased to 30 to 120 mg daily.¹¹ Not all prenatal vitamins contain iron; those that do typically contain 17 to 28 mg of elemental iron per dose.

Many pregnant women taking oral iron, especially at doses greater than 30 mg daily, have gastrointestinal side effects, which cause them to discontinue the iron therapy.¹² Taking iron supplementation on an intermittent basis may help to reduce gastrointestinal side effects and improve iron stores.¹³

In the past, a standard approach to the treatment of iron deficiency anemia was oral ferrous sulfate 325 mg (65 mg elemental iron) spaced in 3 doses each day for a total daily dose of 195 mg elemental iron. However, recent absorption studies concluded that maximal absorption of iron occurs with a dose in the range of 40 to 80 mg of elemental iron daily. Greater doses do not result in more iron absorption and are associated with more side effects.^14,15 (See “Start using alternate-day oral iron dosing, and stop using daily iron dosing.”)

Oral iron should not be taken in close approximation to the consumption of milk, cereals, tea, coffee, eggs, or calcium supplements. The absorption of oral iron is enhanced by the consumption of orange juice or 250 mg of vitamin C. Gastrointestinal side effects include nausea, flatulence, constipation, diarrhea, epigastric distress, and vomiting. If gastrointestinal side effects occur, interventions that might improve tolerability include: reduce the dose of iron or administer intermittently or use a low dose of oral iron, where dosing can be more easily titrated.

We re-check ferritin and hemoglobin levels 2 to 4 weeks after initiation of oral iron therapy and expect to see a hemoglobin rise of 1 g/dL if the therapy is effective.

Intravenous iron treatment

For women with iron deficiency anemia who cannot tolerate oral iron or in whom oral iron treatment has not resolved their anemia, intravenous (IV) iron treatment may be an optimal approach. Women in the third trimester of pregnancy with iron deficiency anemia have very little time to consume sufficient quantities of oral iron in food and supplements to restore their deficiency and reverse their anemia. Consequently, treatment with IV iron may be especially appropriate for women with iron deficiency anemia in the third trimester of pregnancy. Prior gastric surgery, including gastric bypass, results in reduced gastric acid production and causes severe impairment of intestinal absorption of iron. Patients with malabsorption syndromes, including celiac disease, also may have limited absorption of oral iron. These populations of pregnant women may particularly benefit from the use of IV iron. In pregnant women IV iron has fewer gastrointestinal side effects than oral iron.¹⁶

Many severely iron deficient patients need 1,000 mg of iron to resolve their deficit. In order to avoid giving multiple standard doses (200 mg per infusion, with 5 infusions over many days), some centers have explored the use of 1 large dose of IV iron (1,000 mg of low molecular weight iron dextran administered over 1 hour) (INFeD, Watson Pharma).^17–19 This is not a regimen that is specifically approved by the US Food and Drug Administration. An alternative regimen is to administer 750 mg of ferrous carboxymaltose (Injectafer, Luitpold Pharmaceuticals) over 15 minutes, which is an FDA-approved regimen.¹⁸ Many hematologists prefer to administer multiple smaller doses of iron. For example, in our practice, pregnant women are commonly treated with IV iron sucrose (300 mg) every 2 weeks for 3 doses. To increase access of pregnant women to IV iron treatment, obstetricians need to work with hematologists and infusion centers to create collaborative protocols to expeditiously treat women in the third trimester.

There is an epidemic of iron deficiency in pregnant women in the United States. In an era of high technology medicine, it is surprising that iron deficiency remains an unsolved obstetric problem in our country.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

EXPERT COMMENTARY

Health care services for women are fragmented due to multiple types of providers who offer a variety of care. Simon and Uddin’s recent research analysis indicates that the percentage of nonpregnant women who visit a general ObGyn, whether alone or in combination with an internist, family physician, or general practitioner, has declined.

Details of the study

The authors used data from the National Health Interview Survey of a representative sample of US women age 18 or older. They sought to identify whether the women saw or talked to a physician who either specialized in women’s health (presumably an ObGyn) or treated a variety of illnesses during the previous 12 months.

While the percentage of women who saw a general physician remained essentially the same (70%–74%), it declined for seeing an ObGyn from 45% to 41% between 2003 and 2007, and from 42% to 38% between 2011 and 2015. Furthermore, the percentage of women who saw both an ObGyn and a general physician declined from a peak of 35% in 2003 to 30% in 2015.

Study strengths and weaknesses

The data used in this study were from a nationally representative, cross-sectional, multistage sample, population health survey conducted by the Centers for Disease Control and Prevention. The study period was sufficient to draw conclusions.

From my perspective, the study had 2 major limitations: 1) only physicians, not mid-level providers, were included in the analysis, and 2) no breakdown of the women’s age groups was provided.

Many ObGyn offices employ nurse practitioners and midwives, and these providers’ roles are increasingly important for improving frontline access to care and different levels of care. Women aged 19 to 39 seek almost all their health care from ObGyns or family physicians, and significant sharing of care exists across these provider groups.¹ Women aged 45 to 64 are more likely to obtain care exclusively at the offices of family physicians or general internists than at those of ObGyns.² Most ObGyns are engaged to some degree with women aged 65 years or older, especially for preventive care, disease screening and early detection, and urogenital conditions.³

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

EXPERT COMMENTARY

Health care services for women are fragmented due to multiple types of providers who offer a variety of care. Simon and Uddin’s recent research analysis indicates that the percentage of nonpregnant women who visit a general ObGyn, whether alone or in combination with an internist, family physician, or general practitioner, has declined.

Details of the study

The authors used data from the National Health Interview Survey of a representative sample of US women age 18 or older. They sought to identify whether the women saw or talked to a physician who either specialized in women’s health (presumably an ObGyn) or treated a variety of illnesses during the previous 12 months.

While the percentage of women who saw a general physician remained essentially the same (70%–74%), it declined for seeing an ObGyn from 45% to 41% between 2003 and 2007, and from 42% to 38% between 2011 and 2015. Furthermore, the percentage of women who saw both an ObGyn and a general physician declined from a peak of 35% in 2003 to 30% in 2015.

Study strengths and weaknesses

The data used in this study were from a nationally representative, cross-sectional, multistage sample, population health survey conducted by the Centers for Disease Control and Prevention. The study period was sufficient to draw conclusions.

From my perspective, the study had 2 major limitations: 1) only physicians, not mid-level providers, were included in the analysis, and 2) no breakdown of the women’s age groups was provided.

Many ObGyn offices employ nurse practitioners and midwives, and these providers’ roles are increasingly important for improving frontline access to care and different levels of care. Women aged 19 to 39 seek almost all their health care from ObGyns or family physicians, and significant sharing of care exists across these provider groups.¹ Women aged 45 to 64 are more likely to obtain care exclusively at the offices of family physicians or general internists than at those of ObGyns.² Most ObGyns are engaged to some degree with women aged 65 years or older, especially for preventive care, disease screening and early detection, and urogenital conditions.³

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

EXPERT COMMENTARY

Health care services for women are fragmented due to multiple types of providers who offer a variety of care. Simon and Uddin’s recent research analysis indicates that the percentage of nonpregnant women who visit a general ObGyn, whether alone or in combination with an internist, family physician, or general practitioner, has declined.

Details of the study

The authors used data from the National Health Interview Survey of a representative sample of US women age 18 or older. They sought to identify whether the women saw or talked to a physician who either specialized in women’s health (presumably an ObGyn) or treated a variety of illnesses during the previous 12 months.

While the percentage of women who saw a general physician remained essentially the same (70%–74%), it declined for seeing an ObGyn from 45% to 41% between 2003 and 2007, and from 42% to 38% between 2011 and 2015. Furthermore, the percentage of women who saw both an ObGyn and a general physician declined from a peak of 35% in 2003 to 30% in 2015.

Study strengths and weaknesses

The data used in this study were from a nationally representative, cross-sectional, multistage sample, population health survey conducted by the Centers for Disease Control and Prevention. The study period was sufficient to draw conclusions.

From my perspective, the study had 2 major limitations: 1) only physicians, not mid-level providers, were included in the analysis, and 2) no breakdown of the women’s age groups was provided.

Many ObGyn offices employ nurse practitioners and midwives, and these providers’ roles are increasingly important for improving frontline access to care and different levels of care. Women aged 19 to 39 seek almost all their health care from ObGyns or family physicians, and significant sharing of care exists across these provider groups.¹ Women aged 45 to 64 are more likely to obtain care exclusively at the offices of family physicians or general internists than at those of ObGyns.² Most ObGyns are engaged to some degree with women aged 65 years or older, especially for preventive care, disease screening and early detection, and urogenital conditions.³

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.