title: Sources of variation in menstrual blood loss.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001724:Birth Weight; D001827:Body Height; D003276:Contraceptives, Oral; D004739:England; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008598:Menstruation; D010298:Parity; D014599:Uterus / Q000033:anatomy & histology / Q000098:blood supply / Q000502:physiology
chemical_list: D003276:Contraceptives, Oral