Secondary amenorrhea describes the absence of a period (or menstruation) for more than 3 months in a woman of reproductive age. The first cause of secondary amenorrhea is pregnancy. Aside from this, only 5% of women are affected. Secondary amenorrhea can be caused by a uterine or ovarian anomaly, early menopause, a hormonal problem (often hypophysis: the pituitary gland situated at the base of the brain which regulates hormone levels in the body), an eating disorder (anorexia nervosa), stress, the wrong dosage of a contraceptive pill, the practice of a high-level sport. The treatment is adapted to the cause of amenorrhea.