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chorionic villus

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.01 sec.
chorionic villus
n.
Any of the various fingerlike projections of the chorion of the embryo that contain fetal blood vessels and grow into the intervillous lacuna of the placenta.


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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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