Norgestrel is a progestin

Progestin

A progestin is a synthetic progestogen that has progestinic effects similar to progesterone. The two most common uses of progestins are for hormonal contraception , and to prevent endometrial hyperplasia from unopposed estrogen in hormone replacement therapy...

 used in hormonal contraceptives. Norgestrel is a mixture of two stereoisomers, dextro-norgestrel (CAS# 797-64-8) and levo-norgestrel (CAS# 797-63-7). Only levonorgestrel

Levonorgestrel

Levonorgestrel is a second generation synthetic progestogen used as an active ingredient in some hormonal contraceptives.-Chemistry:...

is biologically active. Therefore, while some medications may contain dextronorgestrel, they are often labeled in terms of their levonorgestrel content only, ignoring the inert isomer.
It is used in the hormonal contraceptive Microgynon 30, among others.