title: Factors limiting the development of new contraceptives.
mesh_terms: D002715:Chlormadinone Acetate / Q000266:history; D003270:Contraceptive Agents; D003273:Contraceptive Devices; D010330:Patents as Topic; D012106:Research; D014481:United States; D014486:United States Food and Drug Administration; D014944:World Health Organization
chemical_list: D003270:Contraceptive Agents; D002715:Chlormadinone Acetate