Which of the following statements about hormone regulation of the female reproductive

cycle is false?

a. LH and FSH are produced in the pituitary, and estradiol and progesterone are

produced in the ovaries.

b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium

to thicken.

c. Both progesterone and estradiol are produced by the follicles.

d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but

stimulated by high levels of estradiol