title: Failure of components of the negative feedback system.
mesh_terms: D000568:Amenorrhea / Q000209:etiology*; D000856:Anorexia Nervosa / Q000209:etiology; D001835:Body Weight; D004967:Estrogens / Q000172:deficiency*; D005246:Feedback; D005260:Female; D005640:Follicle Stimulating Hormone / Q000378:metabolism; D006065:Gonadotropins, Pituitary / Q000378:metabolism*; D006801:Humans; D007006:Hypogonadism / Q000378:metabolism*; D007247:Infertility, Female / Q000209:etiology; D007986:Luteinizing Hormone / Q000378:metabolism; D008593:Menopause; D008875:Middle Aged; D011388:Prolactin / Q000097:blood
chemical_list: D004967:Estrogens; D006065:Gonadotropins, Pituitary; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone