<unk> , sold under the brand names Gestanin and Turinal among others, is a progestin medication which is used to treat recurrent and threatened miscarriage and to prevent premature labor in pregnant women. However, except in the case of proven progesterone deficiency, its use for such purposes is no longer recommended. It is also used in Japan to treat benign prostatic hyperplasia (BPH) in men. The medication is used alone and is not formulated in combination with an estrogen. It is taken by mouth. Side effects of<unk>  are few and have not been well-defined, but are assumed to be similar to those of related medications.<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 no other important hormonal activity. The medication is a prodrug of 17α-allyl-19-nortestosterone (3-ketoallylestrenol) in the body.<unk>  was first described in 1958 and was introduced for medical use by 1961. It has been marketed widely throughout the world in the past, but today its availability and usage are relatively limited. It remains available in a few European countries and in a number of Asian countries.
Allylestrenol
Lynestrenol
Ethylestrenol
Norethandrolone
Androstanolone
Androstanolone benzoate
Norethisterone
Cloxotestosterone acetate