NEET Biology question

Progestin-estradiol combined contraceptive pills inhibit ovulation by:

(A)Negative feedback on the release of estrogen from the ovary and morphological changes required for follicular development in the follicular phase
(B)Preventing uterine physiological and morphological changes required for implantation
(C)Inhibiting secretion of follicle stimulating hormone (FSH) and luteinising hormone (LH) that are necessary for ovulationCorrect
(D)Both (a) and (c)

Answer: (C)

Solution

Combined oral contraceptives suppress the gonadotropins FSH and LH, preventing the rise in estrogen, the mid-cycle LH surge, and

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Question ID VK-118899