Ovulation Is Triggered Primarily by

Multiple Choice

Ovulation is triggered primarily by

A) a surge of LH that occurs halfway through the menstrual cycle.
B) the falling levels of estrogen and progesterone.
C) the rising levels of progesterone.
D) both a surge of LH that occurs halfway through the menstrual cycle and the rising levels of progesterone.
E) progressively higher levels of human chorionic gonadotropin.