Osmosis video - Amenorrhea: Clinical

Amenorrhea is the absence of menstrual periods in a woman of reproductive age. There are two types of amenorrhea: primary and secondary. Primary amenorrhea is the failure to menstruate by the time a girl has reached 16 years of age. Secondary amenorrhea is the absence of menstrual periods for six months or more in women who have previously had at least one menstrual period.

Amenorrhea can be caused by a number of things such as stress, exercising too much, hormonal problems, and pregnancy.