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Refer to the hormonal profile of the menstrual cycle in the figure. Around day 14, the surge of which hormone causes ovulation? 
AFSH
BEstrogen
CLH
DProgesterone
Answer & Solution
Correct answer: C. LH
The plot shows a sharp LH spike around day 14 — this **LH surge** ruptures the mature Graafian follicle and releases the secondary oocyte. FSH stimulates earlier follicular growth; progesterone rises after ovulation in the luteal phase.
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