The elevated plasma concentration of estrogen early in the luteal phase has little effect on the secretion of luteinizing hormone (LH) because
A) secretin release is inhibited.
B) inhibin strongly inhibits LH release.
C) progesterone strongly inhibits LH release.
D) the corpus luteum degenerates.
E) gonadotropin -releasing hormone (GnRH) is reduced.

Question

Quizplus · Accepted Answer

Progesterone, which is produced in high amounts by the corpus luteum during the luteal phase, has a strong inhibitory effect on LH release. This helps to prevent the initiation of another ovulatory cycle too soon.

The Elevated Plasma Concentration of Estrogen Early in the Luteal