| 1. | Its contact with zona pellucida of the ova |
| 2. | Reactions within the uterine environment of the female |
| 3. | Reactions within the epididymal environment of the male |
| 4. | Androgens produced in the uterus |
| 1. | Seminal vesicle | 2. | Testes |
| 3. | Prostate | 4. | Bulbourethral gland |
| 1. | Epididymis | 2. | Ejaculatory duct |
| 3. | Efferent ductule | 4. | Ureter |
| I: | In females, FSH initiates follicular growth. |
| II: | In males, FSH induces Sertoli cells to secrete certain factors. |
| A: | The trophoblast layer gets attached to the endometrium. |
| B: | The inner cell mass gets differentiated as the embryo. |
| 1. | Follicle Stimulating Hormone |
| 2. | Luteinizing Hormone |
| 3. | Estrogen |
| 4. | Progesterone |
| 1. | basal plate | 2. | acrosome |
| 3. | nebenkern | 4. | corona radiata |