One of the mysteries of the English language finally explained.
A test made in early pregnancy to detect congenital abnormalities in the fetus. A tiny tissue sample is taken from the villi of the chorion, which forms the fetal part of the placenta.
- ‘Women at higher risk of carrying a baby with such conditions may opt for testing procedures like amniocentesis or chorionic villus sampling.’
- ‘Another prenatal test, called chorionic villus sampling, can diagnose most, but not all, of the same birth defects as amniocentesis.’
- ‘These options include amniocentesis, early amniocentesis, chorionic villus sampling, and ultrasound examination.’
- ‘Prenatal tests called amniocentesis and chorionic villus sampling can diagnose Tay-Sachs before birth.’
- ‘Some birth defects can be diagnosed before birth, using one or more prenatal tests including ultrasound, amniocentesis and chorionic villus sampling.’
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