title: Effect of exercise on puberty, periods and pregnancy.
mesh_terms: D000568:Amenorrhea / Q000209:etiology; D001823:Body Composition; D001835:Body Weight; D004967:Estrogens / Q000378:metabolism; D005260:Female; D006065:Gonadotropins, Pituitary / Q000378:metabolism; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000502:physiology; D008550:Melatonin / Q000096:biosynthesis; D008598:Menstruation; D005082:Physical Exertion; D010870:Pineal Gland / Q000378:metabolism; D010906:Pituitary Hormone-Releasing Hormones / Q000378:metabolism; D011247:Pregnancy; D011374:Progesterone / Q000378:metabolism; D011627:Puberty; D013177:Sports
chemical_list: D004967:Estrogens; D006065:Gonadotropins, Pituitary; D010906:Pituitary Hormone-Releasing Hormones; D011374:Progesterone; D008550:Melatonin