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A 40-year-old member asked:

At what stage is chorionic villus sampling done?

2 doctor answers6 doctors weighed in
Dr. Golder Wilson
Specializes in Clinical Genetics
10-12 weeks: Chorionic villus sampling (cvs) obtains cells from the fetoplacenta for testing at 10-12 weeks of pregnancy, amniocentesis obtains fetal skin/urine cells at 16-18 weeks. Higher risks for miscarriage (2-3% for cvs, <0.5% or negligible for amnio) balance against the cvs advantage of testing before a women "shows, " preserving the privacy of pregnancy (testing).
Dr. Stephen Pappachen
Obstetrics and Gynecology 23 years experience
About 8 weeks: Keep in mind that this is the first trimester and risk of pregnancy loss in increased when compared to amniocentesis, which is usually done in the second trimester for diagnostic purposes.

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A 46-year-old member asked:

How, when is chorionic villus sampling performed?

1 doctor answer2 doctors weighed in
Dr. Dennis Higginbotham
American Board of Obstetrics and Gynecology 31 years experience
First trimester: Cvs can be performed as early as 9 to 12 weeks of gestation - compared to amniocentesis that is usually done at 1bout 15 weeks.

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Last updated Mar 22, 2020

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