One of the symptoms of anorexia nervosa (a.n.) is cessation of pubescence or secondary amenorrhea. Their origin in anorexia nervosa is multifactorial, partly resulting from starvation-induced hipogonadism. Amenorrhea in a.n. may persist despite weight recovery and is often related to osteoporosis. The authors' present causes of amenorrhea and its persisting in a.n., pointing to the factors influencing prognosis according to resumption of menses. They also review reports of hormonal replacement therapy in this group of patients.