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Does chorionic villi sampling determine whether a fetus has genetic abnormalities?
1 doctor weighed in

Dr. Danae Steele
Obstetrics & Gynecology - Maternal Fetal Medicine
In brief: 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.

In brief: 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.
Dr. Danae Steele
Dr. Danae Steele
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