In a 28-day menstrual cycle, rapid secretion of LH occurs on which day?
A
8th day
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B
14th day
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C
20th day
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D
5th day
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Solution
The correct option is B 14th day Rapid secretion of LH i.e. luteinising hormone usually occurs during the mid-cycle. This is called LH surge which usually is observed on the 14th day of the 28-day menstrual cycle.
LH surge induces ovulation. Rupture of Graafian follicle and release of secondary oocyte is called ovulation.