This article is from the Pregnancy Screening FAQ, by Lynn Gazis-Sax (gazissax@netcom.com) with numerous contributions by others.
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From Robbrenner@aol.com (Robert Brenner MD):
2b. There are many birth defects that can't be picked up on prenatal
testing, specifically mental retardation and cerebral palsy. The list
is too numerous to mention.
 
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