User login
Babies of mothers who experience significant psychological distress during pregnancy showed evidence of altered brain development in utero and reduced cognitive outcomes at 18 months, based on data from a pair of studies including approximately 300 women.
In a longitudinal study published in JAMA Network Open, Yao Wu, PhD, of Children’s National Hospital, Washington, and colleagues recruited 97 healthy mother-infant dyads between January 2016 and October 2020 at a single center. Of these, 87 underwent two fetal brain imaging studies each, and 10 completed the first MRI visit, for a total of 184 fetal MRIs.
Neurodevelopment and social-emotional development for infants at 18 months of age was measured using the Bayley Scales of Infant and Toddler Development and Infant-Toddler Social and Emotional Assessment. The mean age of the mothers was 35 years; maternal distress was assessed between 24 and 40 weeks’ gestation using validated self-report questionnaires. Parenting stress was assessed at the 18-month infant testing using the Parenting Stress Index-Short Form.
Overall, prenatal maternal stress was negatively associated with infant cognitive performance (P = .01) at 18 months, mediated by fetal left hippocampal volume.
In addition, increased fetal cortical local gyrification index and sulcal depth measured during reported times of prenatal maternal distress were associated with significantly poorer social-emotional scores and competence scores at age 18 months. The beta coefficients for local gyrification index and sulcal depth were –54.62 and –14.22, respectively, for social-emotional and competence scores, –24.01 and –7.53, respectively; P values were P < .001, P < .002, P = .003, P < .001, respectively.
“Increased cortical gyrification has been suggested in children with dyslexia and autism, and sulcal depth has been associated with the severity of impaired performance on working memory and executive function in adults with schizophrenia,” the researchers wrote in their discussion of the findings.
The current study “extends our previous findings and suggests a critical role for disturbances in emerging fetal cerebral cortical folding development in mediating the association between prenatal maternal distress and neurodevelopmental problems that later manifest in infancy,” they explained.
The researchers also found that prenatal maternal anxiety, stress, and depression were positively associated with all measures of parenting stress at the 18-month testing visit.
The study findings were limited by several factors including the use of self-reports for both maternal distress and infant social-emotional assessment, despite the use of validated questionnaires, and the fact that assessment of maternal distress at specific times may not reflect the entire pregnancy, the researchers noted. Other potential limitations included the inability to use some MRI data because of fetal movement and the homogenous population of relatively highly educated women with access to health care that may not reflect other areas, they said.
“Identifying early brain developmental biomarkers may help improve the identification of infants at risk for later neurodevelopmental impairment who might benefit from early targeted interventions,” the researchers concluded.
Technology enhances health and disease models
The effect of the prenatal period on future well-being is recognized, but the current study makes “substantial contributions to prenatal programming science, with implications for ways to transform the prenatal care ecosystem for two-generation impact,” Catherine Monk, PhD, and Cristina R. Fernández, MD, both of Columbia University, New York, wrote in an accompanying editorial.
The developmental origins of health and disease (DOHaD) conceptual model introduced by Dr. David Barker in 1995 were later applied to show that maternal stress, depression, and anxiety affected child prenatal and future development, they said. However, the current study uses cutting-edge neuroscience to directly assess developing fetal brains. The finding of reduced cognitive functioning at 18 months associated with maternal stress is consistent with other findings, they noted.
“Finding an association between maternal prenatal stress and infant cognitive outcomes in the setting of what may be modest stress relative to that of a low-resourced or historically marginalized sample underscores the importance of this research; presumably, with higher stress, and greater social determinants of health burden, the effect sizes would be even greater and of greater concern,” they said.
However, studies such as the current one “have the potential to transform the prenatal and postpartum care ecosystems,” by encouraging a whole-person approach to the care of pregnant women, including attention to mental well-being and quality of life, they emphasized.
COVID-19 stress considerations
In a separate study published in Communications Medicine, Yuan-Chiao Lu, MD, also of Children’s National Hospital in Washington, and colleagues found a similar effect of maternal stress on fetal brain development.
The researchers imaged the brains of fetuses before and during the COVID-19 pandemic and interviewed mothers about any distress they experienced during pregnancy.
The study population included 65 women with known COVID-19 exposures who underwent 92 fetal MRIs and 137 prepandemic controls who underwent 182 fetal MRIs. Maternal distress was measured via the Spielberger State Anxiety Inventory, Spielberger Trait Anxiety Inventory, Perceived Stress Scale, and Edinburgh Postnatal Depression Scale.
Overall, scores on measures of stress and depression were significantly higher for women in the pandemic group compared with controls. Of the 173 women for whom maternal distress measures were available, 28% of the prepandemic group and 52% of the pandemic group met criteria for elevated maternal psychological distress, defined as above the threshold for distress on any one of the four measures.
After the researchers controlled for maternal distress, MRI data showed decreases in fetal white matter and in hippocampal and cerebellar volumes in fetuses in the pandemic group compared with controls.
Other signs of impaired brain development were similar to those seen in the JAMA Network Open study, including decreased cortical surface area and local gyrification index, as well as reduced sulcal depth in multiple brain lobes, indicating delayed cerebral cortical gyrification.
The second study was limited by a lack of data on other lifestyle changes during the pandemic that might influence maternal health and fetal development, the researchers noted. Other limitations were the possible lack of generalizability to a range of racial and ethnic populations and geographic areas outside of Washington, and the inability to control for unknown COVID-19 exposures or subclinical infections in controls, they said.
However, the results support findings from previous studies, and provide a unique opportunity to study the effect of prenatal stress on early development, as well as a chance to implement “novel and timely interventions,” the researchers wrote.
“Monitoring the COVID generation of infants for long-term cognitive and health outcomes after birth is warranted and currently underway,” and continued research may inform preventive strategies for pregnant women experiencing multiple stressors beyond the pandemic, they concluded.
Interpret pandemic effect with caution
“Research studies, as well as our own daily experiences, have made it abundantly clear that stress is on the rise as a consequence of the COVID-19 pandemic,” said editorial author Dr. Monk, who commented on the second study in an interview. “This is an important public health question: Early identification of pandemic effects on child development can help garner the necessary resources to intervene early, dramatically increasing the likelihood of improving that child’s developmental trajectory,” she said.
“The pandemic is an unprecedented experience that has widespread impact on people’s lives, how could it not also alter gestational biology and the developing brain? That being said, we need to be cautious in that we do not yet know the functional implications of these brain changes for longer-term development,” Dr. Monk said. “Also, we do not know what aspects of women’s pandemic-affected lives had an influence on fetal brain development. The authors found higher stress in pandemic versus nonpandemic women, but not evidence that distress was the mediating variable relating pregnancy during the pandemic to altered brain development,” she explained.
The take-home message for clinicians is to “provide your patients with realistic avenues for neurodevelopmental assessments of their children if they, or you, have concerns,” Dr. Monk said. “However, do not prejudge ‘pandemic babies,’ as not all children will be affected by these potential pandemic effects,” she emphasized. “It is possible to misjudge normal variation in children’s development and unnecessarily raise parents’ anxiety levels. Importantly, this period of brain plasticity means any needed intervention likely can have a big, ameliorating impact,” she added.
“We need follow-up studies looking at pandemic effects on prenatal and postnatal development and what factors protect the fetus and birthing person from the negative influences,” she said.
The JAMA study was supported by the National Institutes of Health and the A. James & Alice B. Clark Foundation. The study in Communications Medicine was supported by the National Institutes of Health, the Intellectual and Developmental Disabilities Research Center, and the A. James & Alice B. Clark Foundation. None of the researchers in either study disclosed conflicts of interest. Dr. Monk disclosed grants from the National Institutes of Health, the Bezos Family Foundation, and the Robin Hood Foundation outside the submitted work.
Babies of mothers who experience significant psychological distress during pregnancy showed evidence of altered brain development in utero and reduced cognitive outcomes at 18 months, based on data from a pair of studies including approximately 300 women.
In a longitudinal study published in JAMA Network Open, Yao Wu, PhD, of Children’s National Hospital, Washington, and colleagues recruited 97 healthy mother-infant dyads between January 2016 and October 2020 at a single center. Of these, 87 underwent two fetal brain imaging studies each, and 10 completed the first MRI visit, for a total of 184 fetal MRIs.
Neurodevelopment and social-emotional development for infants at 18 months of age was measured using the Bayley Scales of Infant and Toddler Development and Infant-Toddler Social and Emotional Assessment. The mean age of the mothers was 35 years; maternal distress was assessed between 24 and 40 weeks’ gestation using validated self-report questionnaires. Parenting stress was assessed at the 18-month infant testing using the Parenting Stress Index-Short Form.
Overall, prenatal maternal stress was negatively associated with infant cognitive performance (P = .01) at 18 months, mediated by fetal left hippocampal volume.
In addition, increased fetal cortical local gyrification index and sulcal depth measured during reported times of prenatal maternal distress were associated with significantly poorer social-emotional scores and competence scores at age 18 months. The beta coefficients for local gyrification index and sulcal depth were –54.62 and –14.22, respectively, for social-emotional and competence scores, –24.01 and –7.53, respectively; P values were P < .001, P < .002, P = .003, P < .001, respectively.
“Increased cortical gyrification has been suggested in children with dyslexia and autism, and sulcal depth has been associated with the severity of impaired performance on working memory and executive function in adults with schizophrenia,” the researchers wrote in their discussion of the findings.
The current study “extends our previous findings and suggests a critical role for disturbances in emerging fetal cerebral cortical folding development in mediating the association between prenatal maternal distress and neurodevelopmental problems that later manifest in infancy,” they explained.
The researchers also found that prenatal maternal anxiety, stress, and depression were positively associated with all measures of parenting stress at the 18-month testing visit.
The study findings were limited by several factors including the use of self-reports for both maternal distress and infant social-emotional assessment, despite the use of validated questionnaires, and the fact that assessment of maternal distress at specific times may not reflect the entire pregnancy, the researchers noted. Other potential limitations included the inability to use some MRI data because of fetal movement and the homogenous population of relatively highly educated women with access to health care that may not reflect other areas, they said.
“Identifying early brain developmental biomarkers may help improve the identification of infants at risk for later neurodevelopmental impairment who might benefit from early targeted interventions,” the researchers concluded.
Technology enhances health and disease models
The effect of the prenatal period on future well-being is recognized, but the current study makes “substantial contributions to prenatal programming science, with implications for ways to transform the prenatal care ecosystem for two-generation impact,” Catherine Monk, PhD, and Cristina R. Fernández, MD, both of Columbia University, New York, wrote in an accompanying editorial.
The developmental origins of health and disease (DOHaD) conceptual model introduced by Dr. David Barker in 1995 were later applied to show that maternal stress, depression, and anxiety affected child prenatal and future development, they said. However, the current study uses cutting-edge neuroscience to directly assess developing fetal brains. The finding of reduced cognitive functioning at 18 months associated with maternal stress is consistent with other findings, they noted.
“Finding an association between maternal prenatal stress and infant cognitive outcomes in the setting of what may be modest stress relative to that of a low-resourced or historically marginalized sample underscores the importance of this research; presumably, with higher stress, and greater social determinants of health burden, the effect sizes would be even greater and of greater concern,” they said.
However, studies such as the current one “have the potential to transform the prenatal and postpartum care ecosystems,” by encouraging a whole-person approach to the care of pregnant women, including attention to mental well-being and quality of life, they emphasized.
COVID-19 stress considerations
In a separate study published in Communications Medicine, Yuan-Chiao Lu, MD, also of Children’s National Hospital in Washington, and colleagues found a similar effect of maternal stress on fetal brain development.
The researchers imaged the brains of fetuses before and during the COVID-19 pandemic and interviewed mothers about any distress they experienced during pregnancy.
The study population included 65 women with known COVID-19 exposures who underwent 92 fetal MRIs and 137 prepandemic controls who underwent 182 fetal MRIs. Maternal distress was measured via the Spielberger State Anxiety Inventory, Spielberger Trait Anxiety Inventory, Perceived Stress Scale, and Edinburgh Postnatal Depression Scale.
Overall, scores on measures of stress and depression were significantly higher for women in the pandemic group compared with controls. Of the 173 women for whom maternal distress measures were available, 28% of the prepandemic group and 52% of the pandemic group met criteria for elevated maternal psychological distress, defined as above the threshold for distress on any one of the four measures.
After the researchers controlled for maternal distress, MRI data showed decreases in fetal white matter and in hippocampal and cerebellar volumes in fetuses in the pandemic group compared with controls.
Other signs of impaired brain development were similar to those seen in the JAMA Network Open study, including decreased cortical surface area and local gyrification index, as well as reduced sulcal depth in multiple brain lobes, indicating delayed cerebral cortical gyrification.
The second study was limited by a lack of data on other lifestyle changes during the pandemic that might influence maternal health and fetal development, the researchers noted. Other limitations were the possible lack of generalizability to a range of racial and ethnic populations and geographic areas outside of Washington, and the inability to control for unknown COVID-19 exposures or subclinical infections in controls, they said.
However, the results support findings from previous studies, and provide a unique opportunity to study the effect of prenatal stress on early development, as well as a chance to implement “novel and timely interventions,” the researchers wrote.
“Monitoring the COVID generation of infants for long-term cognitive and health outcomes after birth is warranted and currently underway,” and continued research may inform preventive strategies for pregnant women experiencing multiple stressors beyond the pandemic, they concluded.
Interpret pandemic effect with caution
“Research studies, as well as our own daily experiences, have made it abundantly clear that stress is on the rise as a consequence of the COVID-19 pandemic,” said editorial author Dr. Monk, who commented on the second study in an interview. “This is an important public health question: Early identification of pandemic effects on child development can help garner the necessary resources to intervene early, dramatically increasing the likelihood of improving that child’s developmental trajectory,” she said.
“The pandemic is an unprecedented experience that has widespread impact on people’s lives, how could it not also alter gestational biology and the developing brain? That being said, we need to be cautious in that we do not yet know the functional implications of these brain changes for longer-term development,” Dr. Monk said. “Also, we do not know what aspects of women’s pandemic-affected lives had an influence on fetal brain development. The authors found higher stress in pandemic versus nonpandemic women, but not evidence that distress was the mediating variable relating pregnancy during the pandemic to altered brain development,” she explained.
The take-home message for clinicians is to “provide your patients with realistic avenues for neurodevelopmental assessments of their children if they, or you, have concerns,” Dr. Monk said. “However, do not prejudge ‘pandemic babies,’ as not all children will be affected by these potential pandemic effects,” she emphasized. “It is possible to misjudge normal variation in children’s development and unnecessarily raise parents’ anxiety levels. Importantly, this period of brain plasticity means any needed intervention likely can have a big, ameliorating impact,” she added.
“We need follow-up studies looking at pandemic effects on prenatal and postnatal development and what factors protect the fetus and birthing person from the negative influences,” she said.
The JAMA study was supported by the National Institutes of Health and the A. James & Alice B. Clark Foundation. The study in Communications Medicine was supported by the National Institutes of Health, the Intellectual and Developmental Disabilities Research Center, and the A. James & Alice B. Clark Foundation. None of the researchers in either study disclosed conflicts of interest. Dr. Monk disclosed grants from the National Institutes of Health, the Bezos Family Foundation, and the Robin Hood Foundation outside the submitted work.
Babies of mothers who experience significant psychological distress during pregnancy showed evidence of altered brain development in utero and reduced cognitive outcomes at 18 months, based on data from a pair of studies including approximately 300 women.
In a longitudinal study published in JAMA Network Open, Yao Wu, PhD, of Children’s National Hospital, Washington, and colleagues recruited 97 healthy mother-infant dyads between January 2016 and October 2020 at a single center. Of these, 87 underwent two fetal brain imaging studies each, and 10 completed the first MRI visit, for a total of 184 fetal MRIs.
Neurodevelopment and social-emotional development for infants at 18 months of age was measured using the Bayley Scales of Infant and Toddler Development and Infant-Toddler Social and Emotional Assessment. The mean age of the mothers was 35 years; maternal distress was assessed between 24 and 40 weeks’ gestation using validated self-report questionnaires. Parenting stress was assessed at the 18-month infant testing using the Parenting Stress Index-Short Form.
Overall, prenatal maternal stress was negatively associated with infant cognitive performance (P = .01) at 18 months, mediated by fetal left hippocampal volume.
In addition, increased fetal cortical local gyrification index and sulcal depth measured during reported times of prenatal maternal distress were associated with significantly poorer social-emotional scores and competence scores at age 18 months. The beta coefficients for local gyrification index and sulcal depth were –54.62 and –14.22, respectively, for social-emotional and competence scores, –24.01 and –7.53, respectively; P values were P < .001, P < .002, P = .003, P < .001, respectively.
“Increased cortical gyrification has been suggested in children with dyslexia and autism, and sulcal depth has been associated with the severity of impaired performance on working memory and executive function in adults with schizophrenia,” the researchers wrote in their discussion of the findings.
The current study “extends our previous findings and suggests a critical role for disturbances in emerging fetal cerebral cortical folding development in mediating the association between prenatal maternal distress and neurodevelopmental problems that later manifest in infancy,” they explained.
The researchers also found that prenatal maternal anxiety, stress, and depression were positively associated with all measures of parenting stress at the 18-month testing visit.
The study findings were limited by several factors including the use of self-reports for both maternal distress and infant social-emotional assessment, despite the use of validated questionnaires, and the fact that assessment of maternal distress at specific times may not reflect the entire pregnancy, the researchers noted. Other potential limitations included the inability to use some MRI data because of fetal movement and the homogenous population of relatively highly educated women with access to health care that may not reflect other areas, they said.
“Identifying early brain developmental biomarkers may help improve the identification of infants at risk for later neurodevelopmental impairment who might benefit from early targeted interventions,” the researchers concluded.
Technology enhances health and disease models
The effect of the prenatal period on future well-being is recognized, but the current study makes “substantial contributions to prenatal programming science, with implications for ways to transform the prenatal care ecosystem for two-generation impact,” Catherine Monk, PhD, and Cristina R. Fernández, MD, both of Columbia University, New York, wrote in an accompanying editorial.
The developmental origins of health and disease (DOHaD) conceptual model introduced by Dr. David Barker in 1995 were later applied to show that maternal stress, depression, and anxiety affected child prenatal and future development, they said. However, the current study uses cutting-edge neuroscience to directly assess developing fetal brains. The finding of reduced cognitive functioning at 18 months associated with maternal stress is consistent with other findings, they noted.
“Finding an association between maternal prenatal stress and infant cognitive outcomes in the setting of what may be modest stress relative to that of a low-resourced or historically marginalized sample underscores the importance of this research; presumably, with higher stress, and greater social determinants of health burden, the effect sizes would be even greater and of greater concern,” they said.
However, studies such as the current one “have the potential to transform the prenatal and postpartum care ecosystems,” by encouraging a whole-person approach to the care of pregnant women, including attention to mental well-being and quality of life, they emphasized.
COVID-19 stress considerations
In a separate study published in Communications Medicine, Yuan-Chiao Lu, MD, also of Children’s National Hospital in Washington, and colleagues found a similar effect of maternal stress on fetal brain development.
The researchers imaged the brains of fetuses before and during the COVID-19 pandemic and interviewed mothers about any distress they experienced during pregnancy.
The study population included 65 women with known COVID-19 exposures who underwent 92 fetal MRIs and 137 prepandemic controls who underwent 182 fetal MRIs. Maternal distress was measured via the Spielberger State Anxiety Inventory, Spielberger Trait Anxiety Inventory, Perceived Stress Scale, and Edinburgh Postnatal Depression Scale.
Overall, scores on measures of stress and depression were significantly higher for women in the pandemic group compared with controls. Of the 173 women for whom maternal distress measures were available, 28% of the prepandemic group and 52% of the pandemic group met criteria for elevated maternal psychological distress, defined as above the threshold for distress on any one of the four measures.
After the researchers controlled for maternal distress, MRI data showed decreases in fetal white matter and in hippocampal and cerebellar volumes in fetuses in the pandemic group compared with controls.
Other signs of impaired brain development were similar to those seen in the JAMA Network Open study, including decreased cortical surface area and local gyrification index, as well as reduced sulcal depth in multiple brain lobes, indicating delayed cerebral cortical gyrification.
The second study was limited by a lack of data on other lifestyle changes during the pandemic that might influence maternal health and fetal development, the researchers noted. Other limitations were the possible lack of generalizability to a range of racial and ethnic populations and geographic areas outside of Washington, and the inability to control for unknown COVID-19 exposures or subclinical infections in controls, they said.
However, the results support findings from previous studies, and provide a unique opportunity to study the effect of prenatal stress on early development, as well as a chance to implement “novel and timely interventions,” the researchers wrote.
“Monitoring the COVID generation of infants for long-term cognitive and health outcomes after birth is warranted and currently underway,” and continued research may inform preventive strategies for pregnant women experiencing multiple stressors beyond the pandemic, they concluded.
Interpret pandemic effect with caution
“Research studies, as well as our own daily experiences, have made it abundantly clear that stress is on the rise as a consequence of the COVID-19 pandemic,” said editorial author Dr. Monk, who commented on the second study in an interview. “This is an important public health question: Early identification of pandemic effects on child development can help garner the necessary resources to intervene early, dramatically increasing the likelihood of improving that child’s developmental trajectory,” she said.
“The pandemic is an unprecedented experience that has widespread impact on people’s lives, how could it not also alter gestational biology and the developing brain? That being said, we need to be cautious in that we do not yet know the functional implications of these brain changes for longer-term development,” Dr. Monk said. “Also, we do not know what aspects of women’s pandemic-affected lives had an influence on fetal brain development. The authors found higher stress in pandemic versus nonpandemic women, but not evidence that distress was the mediating variable relating pregnancy during the pandemic to altered brain development,” she explained.
The take-home message for clinicians is to “provide your patients with realistic avenues for neurodevelopmental assessments of their children if they, or you, have concerns,” Dr. Monk said. “However, do not prejudge ‘pandemic babies,’ as not all children will be affected by these potential pandemic effects,” she emphasized. “It is possible to misjudge normal variation in children’s development and unnecessarily raise parents’ anxiety levels. Importantly, this period of brain plasticity means any needed intervention likely can have a big, ameliorating impact,” she added.
“We need follow-up studies looking at pandemic effects on prenatal and postnatal development and what factors protect the fetus and birthing person from the negative influences,” she said.
The JAMA study was supported by the National Institutes of Health and the A. James & Alice B. Clark Foundation. The study in Communications Medicine was supported by the National Institutes of Health, the Intellectual and Developmental Disabilities Research Center, and the A. James & Alice B. Clark Foundation. None of the researchers in either study disclosed conflicts of interest. Dr. Monk disclosed grants from the National Institutes of Health, the Bezos Family Foundation, and the Robin Hood Foundation outside the submitted work.
FROM JAMA NETWORK OPEN AND COMMUNICATIONS MEDICINE