title: [A clinical study of the triphasic contraceptive Tri-Regol].
authors.forename: E
authors.initials: E
authors.lastname: Rachev
mesh_terms: D000328:Adult; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects / Q000627:therapeutic use; D004997:Ethinyl Estradiol / Q000009:adverse effects / Q000627:therapeutic use; D019304:Ethinyl Estradiol-Norgestrel Combination; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000187:drug effects; D008599:Menstruation Disturbances / Q000188:drug therapy; D009644:Norgestrel / Q000009:adverse effects / Q000627:therapeutic use
chemical_list: D003280:Contraceptives, Oral, Synthetic; D009644:Norgestrel; D004997:Ethinyl Estradiol; D019304:Ethinyl Estradiol-Norgestrel Combination
vernacular_title: Klinichno prouchvane na trifazen kontratseptiv--Tri-Regol.