| Proliferative Phase | Secretory Phase |
| 1. Proliferative phase begins with the repair of endometrium. | 1. Secretory phase begins with ovulation. |
| 2. Time required for proliferative phase is 5th to 13th day of menstrual cycle. | 2. Time required for secretory phase is 15th to 28th day of menstrual cycle. |
| 3. Proliferative phase always ends with ovulation. | 3. Secretory phase ends with menstruation if egg is not fertilized. It continues further if egg is fertilized. |
| 4. Proliferative phase is in uterus which coincides . with follicular phase in ovary during which there is formation of Graafian follicle. | 4. Secretory phase is in uterus which coincides with luteal phase in ovary during which there is formation of corpus luteum. |
| 5. Proliferative phase is controlled by FSH from anterior pituitary. | 5. Secretory phase is controlled by LH from anterior pituitary |
| 6. Hormone estrogen is secreted during this phase. | 6. Hormone progesterone is secreted during this phase |
| 7. It causes the development of blood vessels and thickening of endometrium of uterus. | 7. It causes further thickening and secretory activity of the glands of endometrium of uterus. |
