Why cannot a woman get pregnant again during pregnancy?
(A)a woman ovulates during pregnancy, but the oviducts are plugged with protective mucus to prevent sperm from entering
(B)high levels of hCG in the woman's body kill sperm
(C)a woman cannot have intercourse during pregnancy due to the presence of a protective mucus plug that develops in the cervix
(D)high levels of estrogen and progesterone, secreted by the corpus luteum or placenta during pregnancy, inhibit the secretion of gonadotropins and prevent ovulationCorrect
Answer: (D)
Solution
The sustained high levels of oestrogen and progesterone from the corpus luteum (and later the placenta) during pregnancy exert negative
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