title: [The expediency of using natural oestrogens in combined oral contraceptive tablets].
authors.forename: L
authors.initials: L
authors.lastname: Kovacs
authors.forename: S
authors.initials: S
authors.lastname: Zalanyi
authors.forename: A
authors.initials: A
authors.lastname: Tekulics
authors.forename: M
authors.initials: M
authors.lastname: Sas
mesh_terms: D000568:Amenorrhea; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D004958:Estradiol; D004964:Estriol; D004997:Ethinyl Estradiol; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D008597:Menstrual Cycle; D012102:Reproductive Control Agents
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D012102:Reproductive Control Agents; D004997:Ethinyl Estradiol; D004958:Estradiol; D004964:Estriol
keywords: Amenorrhea; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Methods; Contraceptive Methods--side effects; Estradiol; Estriol; Ethinyl Estradiol; Evaluation; Family Planning; Menstrual Cycle; Norethindrone Acetate; Oral Contraceptives, Combined; Oral Contraceptives--side effects; Reproductive Control Agents