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Question

The hormone responsible for maintaining the pregnancy is

A
Prolactin
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B
Oxytocin
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C
Estrogen
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D
Progesterone
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Solution

The correct option is D Progesterone
Progesterone is secreted by corpus luteum (the ovulated follicle) during first three months of pregnancy and by placenta during next 6 months. It prepares the uterus for implantation, maintains the uterine endometrium during pregnancy and inhibits the development of new follicle and menses for about 6 months (by exerting negative feedback on secretion of gonadotropins). In absence of progesterone, disintegration of uterine endometrium can cause abortion/miscarriage and hence, it is regarded as pregnancy hormone. Thus, option D is correct.

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