Delmadinone acetate (INN, USAN, BAN) (brand names Delmate, Estrex, Tardak, Tardastren, Tardastrex, Vetadinon, Zenadrex), sometimes abbreviated as DMA, and also known as 1,6-bisdehydro-6-chloro-17α-acetoxyprogesterone, is a steroidal progestin with antigonadotropic (and hence, antiandrogenic and antiestrogenic) properties which is used to treat androgen-associated conditions in veterinary medicine.