单词 | chorionic villus sampling |
释义 | chorionic villus samplingnoun [mass noun] Medicine A test made in early pregnancy to detect congenital abnormalities in the fetus, in which a tissue sample is taken from the villi of the chorion.Another prenatal test, called chorionic villus sampling, can diagnose most, but not all, of the same birth defects as amniocentesis....
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