If the mammalian ovum fails to get fertilized, which one of the following is unlikely?
Correct answer: C. Estrogen secretion further increases
- A. Corpus luteum will disintegrate
- B. Progesterone secretion rapidly declines
- C. Estrogen secretion further increases
- D. Primary follicle starts developing
Explanation
If the mammalian ovum fails to fertilize choices, (a) and (b) are obvious. Since corpus luteum declines so progesterone also decreases rapidly (progesterone is essential for maintenance of pregnancy). Also estrogen continues to cause growth of the endometrium which ultimately becomes thick enough to breakdown and cause menstruation. Hence choice (c) is incorrect as estrogen secretion does not decrease further. Primary follicles continue developing irrespective of ovulatory condition.
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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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