Free Menstrual Cycle MCQs with Answers
12 Menstrual Cycle MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
12 questions · page 2 of 2
11. During menstrual cycle, luteinizing hormone (LH) is secreted due to:
- A. Decrease in Estrogen
- B. Decrease in FSH
- C. Increase in FSH
- D. Environmental effect
Explanation: This is the option marked correct in the official UHS answer key. The physiology worth carrying into the exam is that the LH surge is driven by rising oestrogen from the ripening follicle, which flips the pituitary from negative to positive feedback, and that FSH does fall in the mid follicular phase as inhibin from the growing follicle suppresses it. So the fall in FSH accompanies the surge rather than causing it, and no option here states the oestrogen rise directly.
Correct answer: Decrease in FSH12. In a normal 28 days menstrual cycle when would you expect the LH surge to occur?
- A. Days 7-10
- B. Days 11-14
- C. Days 15-18
- D. Days 19-22
Explanation: Ovulation falls at about day 14, and the LH surge precedes it by roughly a day, so it lies in the window from day 11 to 14. The luteal phase after ovulation is the fixed part of the cycle at about fourteen days, which is why counting back from the next expected period is the reliable method. Days 15 to 22 fall after ovulation, when progesterone dominates.
Correct answer: Days 11-14