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chorionic villus

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
chorionic villus
n.
One of the minute vascular projections of the fetal chorion that combines with maternal uterine tissue to form the placenta.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.chorionic villus - one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta
chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
villus - a minute hairlike projection on mucous membrane


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Both amniocentesis and another procedure called chorionic villus sampling, in which doctors pluck bits of the placenta, isolate fetal cells that can reveal many genetic problems in an unborn baby with near certainty.
Bringing up baby's DNA: less risky techniques for assessing fetal ... by Brownlee, Christen / Science News
Chorionic villus sampling, to detect genetic abnormalities in the embryo or fetus in the first trimester.
Eugenics and population control in Canada by Shea, John / Catholic Insight
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.
Women & pregnancy by National Women's Health Report
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