NEET 2016 Biology question

Changes in GnRH pulse frequency in females is controlled by circulating levels of:

(1)Estrogen and progesteroneCorrect
(2)Estrogen and inhibin
(3)Progesterone only
(4)Progesterone and inhibin

Answer: (1)

Solution

In females the frequency of GnRH pulses from the hypothalamus is modulated by the circulating levels of the ovarian steroids estrogen and progesterone (feedback regulation) - estrogen mainly via positive feedback before ovulation

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Question ID VK-091956