title: [Results of the use of an estrogen-progestagen combination at low dosage as a contraceptive. Preliminary report].
mesh_terms: D003276:Contraceptives, Oral; D004338:Drug Combinations; D004997:Ethinyl Estradiol / Q000008:administration & dosage* / Q000009:adverse effects; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D009640:Norethindrone / Q000008:administration & dosage* / Q000009:adverse effects; D011247:Pregnancy
chemical_list: D003276:Contraceptives, Oral; D004338:Drug Combinations; D004997:Ethinyl Estradiol; D009640:Norethindrone
vernacular_title: Resultado del uso de una mezcla estrógeno-progestágeno a dósis bajas, como anticonceptivo. Communicación preliminar.