In assisting preconceptual clients, the nurse should teach that the corpus luteum secretes progesterone, which...

(A) Menses occurs during the menstrual phase, during which levels of both estrogen and progesterone are decreased. (B) The ovarian hormone responsible for the proliferative phase, during which the uterine endometrium enlarges, is estrogen. (C) The ovarian hormone responsible for the secretory phase is progesterone, which is secreted by the corpus luteum and causes marked swelling in the uterine endometrium. (D) The corpus luteum begins to degenerate in the ischemic phase, causing a fall in both estrogen and progesterone.