Yes it will.
Heres some more info I found.
"Proviron is a synthetic androgenic steroid and oral antiestrogen used by bodybuilders. A lot of bodybuilders take this substance for two main reasons. They use it to restore sexual disfunctions caused by steroid cycling. It will help get rid of the lack of sexual desire that most bodybuilders experience during a long steroid cycle. It also will help with the decreased sperm count and quality that steroids exhibit on the body. It does not however increase testosterone production in the body. It is also used as an anti-estrogen as well. Proviron provides a dual blocking scheme in that it prevents the aromitization of steroids as well as competes with estrogen to block the receptors as well."