Which of the following statements concerning control of ovarian hormone secretion is incorrect?
a. Low levels of estrogen inhibit the hypothalamus and anterior pituitary in negative-feedback fashion.
b. Under the influence of estrogen from developing follicles, FSH and LH secretion both continue to decline throughout the follicular phase.
c. Both estrogen and progesterone are required to completely inhibit tonic LH secretion.
d. A high level of estrogen stimulates LH secretion and initiates the LH surge.
e. Progesterone powerfully inhibits both FSH and LH secretion.
B
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