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About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH surge) normally occurs?

Correct answer: A. 14th day

  • A. 14th day
  • B. 20th day
  • C. 5th day
  • D. 11th day

Explanation

The correct option (a) 14th day: In a normal human menstrual cycle, the rapid secretion of luteinizing hormone (LH) typically occurs around the 14th day. This surge in LH is also known as the LH surge and is a key event in the menstrual cycle. The LH surge triggers ovulation, which is the release of an egg from the ovary. Following the LH surge, the egg can be fertilized by sperm if sexual intercourse takes place around this time.

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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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