title: A perspective on progestogens in oral contraceptives.
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects*; D005260:Female; D006801:Humans
chemical_list: D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D003280:Contraceptives, Oral, Synthetic