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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.
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 n.
A prenatal test to detect birth defects that is performed at an early stage of pregnancy and involves retrieval and examination of tissue from the chorionic villi.
chorionic villus sampling
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.


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  • Chorioretinitis

    chorioretinitis cho·ri·o·ret·i·ni·tis (kôr’ē-ō-rět’n-ī’tĭs) n. Inflammation of the choroid and retina. Also called choroidoretinitis, retinochoroiditis.

  • Chorioretinopathy

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  • Choripetalous

    [kawr-uh-pet-l-uh s, kohr-] /ˌkɔr əˈpɛt l əs, ˌkoʊr-/ adjective, Botany. 1. having unconnected petals.

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