With regard to the female menstrual cycle, identify the FALSE statement:
a. most women experience a 1-2 year pause in menstruation during their reproductive years without contraception.
b. it acts on two different structures of the reproductive anatomy, generating both an ovarian cycle and uterine cycle.
c. it involves a cyclical production of estrogen and progesterone.
d. young women starting to menstruate commonly do not ovulate every cycle.
e. onset begins with menarche (first menstruation) and ceases with menopause.