title: Letter: Abnormal patency of eustachian tube from oral contraceptives.
mesh_terms: D000328:Adult; D003276:Contraceptives, Oral / Q000009:adverse effects*; D004427:Ear Diseases / Q000139:chemically induced; D005064:Eustachian Tube; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications
chemical_list: D003276:Contraceptives, Oral