Osmosis video - Amenorrhea: Pathology review

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 defined as the failure to achieve menarche by age 16 in the absence of any secondary sexual characteristics, or by 14 if there are secondary sexual characteristics present. Secondary amenorrhea is defined as a cessation of menses for 3 months in a woman with previously established normal menstrual cycles.