In which of the followings the egg is not fertilized?
Correct answer: A. Menstruation
- A. Menstruation
- B. Pregnancy
- C. Implantation
- D. All (A), (B) and (C)
Explanation
Menstruation occurs when the lining of the uterus sheds in the absence of pregnancy. During each menstrual cycle, if the egg released from the ovary (ovulation) is not fertilized by sperm, the thickened lining of the uterus breaks down and is expelled through the vagina, resulting in menstruation. So, in menstruation, the egg is not fertilized.
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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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