Proliferative phase occurs in:
Correct answer: A. 5-13 days
- A. 5-13 days
- B. 1-4 days
- C. 14-20 days
- D. 20-28 days
Explanation
Following menstruation, the proliferative phase begins. It usually lasts from around day 6 to day 14 of a 28-day cycle, but the exact timing can vary. During this phase: Follicle-stimulating hormone (FSH) stimulates the development of ovarian follicles, each containing an immature egg (oocyte). Rising levels of estrogen, produced by the developing follicles, stimulate the growth and proliferation of the endometrial lining in the uterus.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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