Which of the following is responsible for LH surge?

High concentration of progesterone

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Low concentration of GnRH

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High concentration of estrogen

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High concentration of prolactin

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Solution

The correct option is C High concentration of estrogen
High levels of estrogen gives positive feedback to hypothalamus and anterior pituitary, thereby stimulating release of GnRH from hypothalamus and gonadotrophins (FSH and LH) from anterior pituitary. This results in LH surge which is responsible for ovulation.

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