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MCAT Question A Day - 5/23/13 - Answer!

The embryonic hormone HCG stimulates the corpus luteum to continue producing hormones. What hormone does HCG mimic?

B.  LH
C.  Estrogen
D.  Progesterone

The correct answer is (B). LH is the hormone that maintains the corpus luteum. Even though LH production has decreased by the time implantation occurs, HCG acts in its place.