[Regulation of fertility by means of vaginal rings medicated with estradiol and levonorgestrel].
D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D003274:Contraceptive Devices, Female / Q000009:adverse effects; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage; D004958:Estradiol / Q000008:administration & dosage*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D016912:Levonorgestrel; D009644:Norgestrel / Q000008:administration & dosage*
D003277:Contraceptives, Oral, Combined; D009644:Norgestrel; D004958:Estradiol; D016912:Levonorgestrel
Regulación de la fertilidad por medio de anillos vaginales medicados con estradiol y levonorgestrel.