Lesson eLearning

During the follicular phase of the menstrual cycle, which sequence of hormonal events correctly leads to ovulation?

medium MCQ 2 marks Class 12 · Biology · Human Reproduction
  1. FSH rises, stimulating follicle growth; estradiol rises; LH surge leads to ovulation.
  2. LH rises, causing follicle growth; FSH rises; estradiol triggers ovulation.
  3. Estradiol rises, suppresses FSH; LH surge occurs; ovulation follows.
  4. FSH and LH rise together; progesterone rises; ovulation occurs.
Answer
FSH rises, stimulating follicle growth; estradiol rises; LH surge leads to ovulation.

The correct answer is FSH rises, stimulating follicle growth; estradiol rises; LH surge leads to ovulation. — LH surge causes the mature follicle to rupture, releasing the egg (ovulation).

Step-by-step solution

  1. Follicular cells secrete FSH, stimulating growth of primary follicles.
  2. Follicle produces estradiol, which rises in concentration.
  3. Rising estradiol level triggers a surge in LH from the anterior pituitary.
  4. LH surge causes the mature follicle to rupture, releasing the egg (ovulation).
Common mistake: Mixing up the order of FSH and LH rise

Concept tested: Hormonal cascade in follicular phase

Published · How this solution was prepared and checked

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