What is an amniocentesis? Amniocentesis (sometimes called "amnio") is a test in which your doctor takes a small sample of ...

Late amniocentesis demonstrates a 22.9% overall genetic diagnostic yield, with 2.4 times higher yield for fetuses with multiple organ system anomalies (36.4%) vs single organ system anomalies (15.3%).

As with amniocentesis, obstetricians may suggest using CVS, short for chorionic villus sampling, to detect genetic disorders such as Down Syndrome. In CVS, specialists perform an ultrasound to ...

Chorionic villus sampling (CVS) is a newer and slightly more risky alternative to amniocentesis that is performed earlier in the course of development, between 10 and 12 weeks of pregnancy.