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chorionic villus sampling

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.09 sec.
chorionic villus sampling
n. Abbr. CVS
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. Also called chorionic villus biopsy.

chorionic villus sampling  (kôr-nk)
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.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.chorionic villus sampling - a prenatal test to detect birth defects at an early stage of pregnancy; tissue from the chorionic villi is assayed
biopsy - examination of tissues or liquids from the living body to determine the existence or cause of a disease

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ROAMING FREE Amniocentesis and chorionic villus sampling are currently the only way doctors have for analyzing a fetus' genes, but scientists have for decades been contemplating how to replace these tests with less invasive ones.
Chorionic villus sampling, to detect genetic abnormalities in the embryo or fetus in the first trimester.
Previously, the only way to know if a woman was having a baby with Down's was with second-trimester blood tests and/or invasive amniocentesis or chorionic villus sampling (CVS) tests, all of which carry a slight risk of miscarriage.
 
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