Dimethandrolone undecanoate

Dimethandrolone undecanoate (DMAU) is an androgen and a potential hormonal contraceptive for males. It has shown to reduce fertility in males by reducing semen production as well as reducing the motility of the remaining semen.

DMAU reduces levels of testosterone, LH, and FSH likely by exerting similar negative feedback as testosterone on the hypophyseal-pituitary-gonad axis.

The use of DMAU has been reported to have less adverse effects than other tested male hormonal contraceptives. However, long term effects are still being studied.