title: The relationship of headache frequency to hormone use in migraine.
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D004967:Estrogens / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000139:chemically induced*
chemical_list: D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D004967:Estrogens