Ovulation is initiated by a surge in which hormone?

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Study for the NBME Form 13 Test with our comprehensive quiz collection, featuring flashcards and multiple-choice questions to ensure your readiness. Enhance your knowledge with detailed explanations for each question.

Multiple Choice

Ovulation is initiated by a surge in which hormone?

Explanation:
Ovulation is triggered by a surge of luteinizing hormone from the anterior pituitary. As a follicle matures, rising estrogen from that follicle exerts positive feedback, causing a sharp LH increase just before midcycle. That LH surge causes the follicle to rupture and release the oocyte, and it initiates luteinization to form the corpus luteum. While FSH helps recruit and grow follicles earlier in the cycle, it does not drive the ovulatory release. Progesterone rises after ovulation from the corpus luteum.

Ovulation is triggered by a surge of luteinizing hormone from the anterior pituitary. As a follicle matures, rising estrogen from that follicle exerts positive feedback, causing a sharp LH increase just before midcycle. That LH surge causes the follicle to rupture and release the oocyte, and it initiates luteinization to form the corpus luteum. While FSH helps recruit and grow follicles earlier in the cycle, it does not drive the ovulatory release. Progesterone rises after ovulation from the corpus luteum.

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