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MCAT Question A Day - 7/9/14

Decreasing progesterone levels during the luteal phase of the menstrual cycle are associated with:

A.  thickening of the endometrial lining in preparation for implantation of the zygote.
B.  increased secretion of LH, leading to the luteal surge and ovulation.
C.  degeneration of the corpus luteum in the ovary.
D.  increased secretion of estrogen in the follicle, leading to the flow phase of the menstrual cycle.

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