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Which of the following events is not associated with ovulation in human female?

1. Full development of Graafian follicle
2. Release of secondary oocyte
3. LH surge
4. Decrease in estradiol

Correct answer: Decrease in estradiol

Solution

Ovulation is preceded by a rise in estradiol from the mature follicle, which helps trigger the LH surge. A decrease in estradiol is therefore not associated with ovulation; the other options are normal events around this time.

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