When it should be done
Amniocentesis is usually performed between 15-20 weeks of pregnancy. It is sometimes also carried out between 18-22 weeks to det ... » Read on
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Introduction
Chorionic villus sampling (CVS) is a test available to pregnant women, particularly those with a family history of inherited dis ... » Read on
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How it works
The different screening tests look for different things depending on what is being checked for: S ... » Read on
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