The epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother are:
1. | chorionic villi cells | 2. | cytotrophoblast cells |
3. | inner cell mass | 4. | syncytiotrophoblast cells |
Ectopic pregnancies are referred to as :
1. | pregnancies with a genetic abnormality |
2. | implantation of the embryo at a site other than the uterus |
3. | implantation of a defective embryo in the uterus |
4. | pregnancies terminated due to hormonal imbalance |