[Could contraceptives with progestational effect cause voice changes?]. [electronic resource] - Nederlands tijdschrift voor geneeskunde Nov 1975 - 1726-7 p. digital Publication Type: Journal Article ISSN: 0028-2162 Subjects--Topical Terms: Contraceptives, Oral--pharmacologyContraceptives, Oral, Hormonal--pharmacologyFemaleHumansVoice--drug effects