chorionic villus sampling

noun

1. a prenatal test for detecting birth defects at an early stage of pregnancy, involving removal by needle of fluid from the chorionic villus, and examination of the cells obtained.

chorionic villus sampling

noun

1. a method of diagnosing genetic disorders early in pregnancy by the removal by catheter through the cervix or abdomen of a tiny sample of tissue from the chorionic villi CVS

chorionic villus sampling

/ kôr′ē-ŏn′ĭk /

1. A prenatal procedure performed in the first trimester of pregnancy to detect chromosomal defects, consisting of retrieval and examination of tissue from the chorionic villi (projections on the surface of the chorion). The tissue is obtained by passing a catheter through the cervix into the placenta.