The secretion of estrogen and progesterone by the corpus luteum during pregnancy is maintained by______ until the corpus luteum degenerates and the_______ Takes over secretion of these hormones.
A) luteinizing hormone (LH) : endometrium
B) human chorionic gonadotropin (hCG) : placenta
C) human chorionic gonadotropin (hCG) : endometrium
D) human chorionic gonadotropin (hCG) : fetus
E) luteinizing hormone (LH) : placenta

Question

Quizplus · Accepted Answer

Human chorionic gonadotropin (hCG) is produced by the embryo soon after conception and later by the placenta. It maintains the corpus luteum, which in turn secretes estrogen and progesterone to maintain the pregnancy until the placenta takes over this function.

The Secretion of Estrogen and Progesterone by the Corpus Luteum