hypothalmic-pituitary amenorrhea, the cessation of menses associated with functional causes (weight loss, excessive exercise, obesity); drug-induced causes (marijuana or psychoactive drugs, including antidepressants); neoplastic causes (prolactin-secreting pituitary adenomas, craniopharyngioma); psychogenic causes (chronic anxiety, pseudocyesis, or anorexia nervosa); or other causes, such as head injury or chronic medical illness.
