The trophoblast secretes ____, which signals the corpus luteum that pregnancy has begun.
A) estrogen
B) a gray crescent
C) progesterone
D) hCG
E) an enzyme

Question

Quizplus · Accepted Answer

The trophoblast secretes human chorionic gonadotropin (hCG), which signals the corpus luteum that pregnancy has begun, maintaining its function and thereby sustaining the production of progesterone and estrogen necessary for pregnancy maintenance.

The Trophoblast Secretes ____, Which Signals the Corpus Luteum That