A–Z Glossary

Chorionic villi

Tiny fingerlike projections in the placenta that usually contain genetic material matching the fetus.

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CVS testing explained

CVS testing explained

What CVS testing is Chorionic villus sampling is a prenatal diagnostic procedure in which a clinician obtains a very small sample of chorionic villi, the tiny fingerlike projections in the placenta. These cells usually share the fetus’s genetic material because the placenta and fetus develop from the same fertilized egg. The laboratory can then analyze […]