In the__________ phase of the menstrual cycle, the cells of the corpus luteum begin to secrete high levels of progesterone.
a. preovulatory phase
b. ovulation
c. postovulatory phase
d. menstruation
Question 2
The __________ method is a fertility awareness method used to prevent pregnancy by noticing changes in cervical mucus that accompany ovulation.
a. calendar
b. Billings
c. basal body temperature
d. all of the above
