title: New oral contraceptive progestogens.
authors.forename: W B
authors.initials: WB
authors.lastname: Harer
mesh_terms: D003280:Contraceptives, Oral, Synthetic; D017135:Desogestrel; D005260:Female; D006801:Humans; D009652:Norpregnenes
chemical_list: D003280:Contraceptives, Oral, Synthetic; D009652:Norpregnenes; C033273:Gestodene; D017135:Desogestrel