| Some birth defects can be diagnosed before birth, using one or more prenatal tests including ultrasound, amniocentesis and chorionic villus sampling. |
| These options include amniocentesis, early amniocentesis, chorionic villus sampling, and ultrasound examination. |
| Another prenatal test, called chorionic villus sampling, can diagnose most, but not all, of the same birth defects as amniocentesis. |
| Women at higher risk of carrying a baby with such conditions may opt for testing procedures like amniocentesis or chorionic villus sampling. |
| Prenatal diagnosis would consist of DNA analysis done on cells obtained by chorionic villus sampling or amniocentesis. |
| Prenatal tests called amniocentesis and chorionic villus sampling can diagnose Tay-Sachs before birth. |
