<unk> , sold under the brand name Ovral among others, is a progestin medication which is used in birth control pills and in menopausal hormone therapy. It is available both in combination with an estrogen and alone. It is taken by mouth. Side effects of<unk>  include menstrual irregularities, headaches, nausea, breast tenderness, mood changes, acne, increased hair growth, and others.<unk>  is a progestin, or a synthetic progestogen, and hence is an agonist of the progesterone receptor, the biological target of progestogens like progesterone. It has weak androgenic activity and no other important hormonal activity.<unk>  was patented in 1961 and came into medical use, specifically in birth control pills, in 1966. It was subsequently introduced for use in menopausal hormone therapy as well.<unk>  is sometimes referred to as a "second-generation" progestin. It is marketed widely throughout the world.<unk>  is available as a generic medication. In 2017, the version with ethinylestradiol was the 284th most commonly prescribed medication in the United States, with more than one million prescriptions.
Norgestrel
Levonorgestrel
Desogestrel
Gestodene
Etonogestrel
Chloroethynylnorgestrel
5α-Dihydrolevonorgestrel
Cloxestradiol acetate