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


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.