<unk> , also known as ethinyltestosterone, pregneninolone, and anhydrohydroxyprogesterone and formerly sold under the brand names Proluton C and Pranone among others, is a progestin medication which was used in the treatment of gynecological disorders but is now no longer available. It was used alone and was not formulated in combination with an estrogen. The medication is taken by mouth. Side effects of<unk>  include masculinization among 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 some androgenic and anabolic activity and no other important hormonal activity.<unk>  was discovered in 1938 and was introduced for medical use in Germany in 1939 and in the United States in 1945. It was the second progestogen to be marketed, following injected progesterone in 1934, and was both the first orally active progestogen and the first progestin to be introduced.<unk>  was followed by the improved and much more widely used and known progestin norethisterone in 1957.
Ethisterone
Metenolone acetate
Vinyltestosterone
Ethinylestradiol
Ethinylestradiol sulfonate
Fluoxymesterone
Formestane
Estradiol enantate