title: Opioid activity in menstrual disorders.
mesh_terms: D004723:Endorphins / Q000097:blood*; D005260:Female; D006801:Humans; D008599:Menstruation Disturbances / Q000097:blood*; D010911:Pituitary Neoplasms / Q000378:metabolism; D011247:Pregnancy; D011388:Prolactin / Q000378:metabolism*
chemical_list: D004723:Endorphins; D011388:Prolactin