Tetrahydrogestrinone is a potent androgen and progestin.

J Clin Endocrinol Metab

Heart Research Institute, Camperdown, Sydney, New South Wales 2050, Australia.

Published: May 2004

Tetrahydrogestrinone (THG) was recently identified as a novel steroid used illicitly to improve athletic performance. Although its structure is closely related to gestrinone, a 19-nor progestin, and resembles that of trenbolone, THG was never marketed, so information on its hormonal properties is not known. In this study, we demonstrate that THG is a highly potent androgen and progestin in a yeast-based in vitro bioassay system expressing human androgen and progesterone receptors. It has no estrogenic activity and no antagonism for any of the three steroid receptor classes.

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http://dx.doi.org/10.1210/jc.2004-0033DOI Listing

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