A 28-year-old male asked:

What is the definition or description of: ultrasound-guided chorionic villus sampling?

1 doctor answer2 doctors weighed in
Dr. Linda Gromko
Family Medicine 50 years experience
Looks at chomosomes: Chorionic villus sampling enables a doctor to remove a small sample of the tissue that surrounds the early sac of pregnancy. This, then, allows the study of the chomosomes - for early diagnosis of conditions such as Down syndrome (an extra chromosome #21). It is done with ultrasound guidance at roughly 11 weeks of pregnancy. Amniocentesis is a procedure done later in pregnancy for the same reason.
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Someone here please explain the difference between chorionic villus sampling and amniocentesis?
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Last updated Feb 18, 2015

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