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

1. 14th day
2. 20th day
3. 5th day
4. 11th day

Correct answer: 14th day

Solution

In a normal 28-day menstrual cycle, the LH surge occurs near mid-cycle and triggers ovulation. Since ovulation typically happens around day 14, the surge is normally seen about then.

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