Classification of progestins used in combined oral contraceptive pills

Structurally related to testosterone
Ethinylated
Estranes	Norethindrone, norethindrone acetate, ethynodiol diacetate, norethynodrel
13-Ethylgonanes	Levonorgestrel, desogestrel, norgestimate, gestodene
Non-ethinylated	Dienogest, drospirenone
Structurally related to progesterone
Pregnane-derivative	Cyproterone acetate
19-norpregnane derivative	Nomegestrol acetate

Courtesy of Rebecca Allen, MD.

Graphic 120135 Version 1.0

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