Q.

Oral contraceptive pills prevent ovulation by

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a

thickening cervical mucus

b

inhibiting the release of gonadotropins from anterior pituitary

c

preventing the production of oestrogen from the ovary

d

altering the endometrium of the uterus 

answer is B.

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Detailed Solution

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Birth control pills contain either an oestrogen and progestin combination or progestin alone. These hormones in the pill prevent ovulation by inhibiting the release of LH from anterior pituitary through a negative feedback mechanism.

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