Peter R. Lewis, MD

First-trimester screening for trisomies 21 and 18 with maternal serum markers and ultra-sonographic measurement of fetal nuchal translucency is more sensitive than second-trimester “triple screen.” Application of this finding to general practice is limited by lack of access to radiologists trained in this more specialized prenatal ultrasound measurement.

First-trimester screening for trisomies 21 and 18 with maternal serum markers and ultra-sonographic measurement of fetal nuchal translucency is more sensitive than second-trimester “triple screen.” Application of this finding to general practice is limited by lack of access to radiologists trained in this more specialized prenatal ultrasound measurement.

First-trimester screening for trisomies 21 and 18 with maternal serum markers and ultra-sonographic measurement of fetal nuchal translucency is more sensitive than second-trimester “triple screen.” Application of this finding to general practice is limited by lack of access to radiologists trained in this more specialized prenatal ultrasound measurement.