Which of the following hormones maintains the integrity of the uterine wall during pregnancy?

Estrogen

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Progesterone

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Oxytocin

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Intermedin

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Solution

The correct option is A Progesterone
The corpus luteum secretes large amounts of progesterone which is essential for maintenance of the endometrium (wall of the uterus). Such an endometrium is necessary for implantation of the fertilized ovum. In the absence of fertilization, the corpus luteum degenerates which causes disintegration of the endometrium leading to menstruation, making a new cycle. Thus, the correct answer is option B.

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