| Usual classification by generation* | |||
|---|---|---|---|
| Classification by structure | First | Second | Third |
| Estranes | Ethynodiol diacetate (with ethinyl estradiol: Demulen) | — | — |
| Norethindrone (Micronor) | |||
| Norethindrone acetate (Aygestin) | |||
| Gonanes | Norgestrel (Ovrette) | Levonorgestrel (Norplant; with ethinyl estradiol: Alesse, Nordette) | Desogestrel (with ethinyl estradiol: Desogen) Gestodene† Norgestimate (with ethinyl estradiol: Ortho-Cyclen, Ortho Tri-Cyclen) |
| Pregnanes | Medroxyprogesterone acetate (Provera) | — | — |