| 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. |
| Early amniocentesis offers a similar advantage, but the fetal loss rate associated with this technique is higher than that of chorionic villus sampling. |
| A villus has a fibromuscular core with fetal blood vessels and is covered by an epithelium termed the trophoblast. |
| Prenatal tests called amniocentesis and chorionic villus sampling can diagnose Tay-Sachs before birth. |
| The black stained villus projections are probably due to chronic smoke inhalation. |
