A member asked:

Does chorionic villi sampling determine whether a fetus has genetic abnormalities?

A doctor has provided 1 answer

Yes and no: Chorionic villi sampling is a procedure where a small sample of cells from the placenta are removed, early in a pregnancy. A lab can determine if there are any extra or missing chromosomes, or large parts of a chromosome that are extra or missing. Other tests on chorionic villi can look for abnormalities in single genes, but no test can determine that a baby has no genetic abnormalities.

Answered 7/5/2013

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