[Combined hormonal oral contraceptive. Comparative study of 4 schemes].
D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D003278:Contraceptives, Oral, Hormonal / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D012959:Socioeconomic Factors
D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003278:Contraceptives, Oral, Hormonal
Anticonceptivo hormonal oral combinado. Estudio comparativo de cuatro esquemas.