The event happens in menstrual cycle when level of progesterone declines:
Correct answer: B. Beginning of menses
- A. Ovulation
- B. Beginning of menses
- C. Corpus luteum formation
- D. Maturation of ovarian follicle
Explanation
During the menstrual cycle, the level of progesterone in the body increases after ovulation and reaches its peak about one week later. If conception does not occur, the level of progesterone in the body begins to decline, leading to the shedding of the uterine lining and the onset of menstruation.
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About Reproduction
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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