There are two types of amenorrhea: primary and secondary. The failure to menstruate in a 16 year old or older female who has developed secondary sex characteristics or in a 14 year old or older female who has not developed secondary sex characteristics is classified as primary amenorrhea. Inexistent menstruation for either three cycles or six months or in a woman who has had regular menstruation is deemed secondary amenorrhea. Amenorrhea is normal when a … Continue reading