NEET 2000 Biology question

What is the work of progesteron which is present in oral contraceptive pills :

(1)To inhibit ovulationCorrect
(2)To check oogenesis
(3)To check entry of sperms in to cervix & to make them inactive
(4)To check sexual behaviour

Answer: (1)

Solution

Oral contraceptive pills contain progestogen alone or progestogen-oestrogen combinations. The hormones act by inhibiting the release of FSH and LH from the pituitary (negative feedback), so that ovulation does not occur; they also alter the cervical mucus and the uterus so that sperm entry and implantation are

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Question ID VK-088664