title: The contraceptive progestagens.
mesh_terms: D015068:17-Ketosteroids; D000728:Androgens; D002715:Chlormadinone Acetate; D003270:Contraceptive Agents; D003276:Contraceptives, Oral / Q000145:classification; D004967:Estrogens; D009654:Norsteroids; D011372:Progestins
chemical_list: D015068:17-Ketosteroids; D000728:Androgens; D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D004967:Estrogens; D009654:Norsteroids; D011372:Progestins; D002715:Chlormadinone Acetate