Pharmacodynamics<unk>  is a progestogen, or an agonist of the progesterone receptor. The biological activity of<unk>  lies in the levo enantiomer, levonorgestrel, whereas the dextro isomer is inactive. As such,<unk>  is identical in its hormonal activity to levonorgestrel except that it is half as potent by weight. Levonorgestrel, and by extension<unk> , have some androgenic activity, but no estrogenic, antimineralocorticoid, or glucocorticoid activity. Pharmacokinetics The pharmacokinetics of<unk>  have been reviewed.
Norgestrel
Levonorgestrel
Desogestrel
Gestodene
Etonogestrel
Chloroethynylnorgestrel
5α-Dihydrolevonorgestrel
Cloxestradiol acetate