<unk>  is used in combination with ethinylestradiol or quinestrol in combined birth control pills, alone in progestogen-only birth control pills, and in combination with estradiol or conjugated estrogens in menopausal hormone therapy. It has also been used as an emergency contraceptive in the Yuzpe regimen.
Norgestrel
Levonorgestrel
Desogestrel
Gestodene
Etonogestrel
Chloroethynylnorgestrel
5α-Dihydrolevonorgestrel
Cloxestradiol acetate