TweetYes masteron will shut you down, so will winny and primo. It might not shut you down as hard as fina, but any gear, including primo and var even at low doses, will shut most guys down within a few weeks. Masteron isn't nearly as androgenic as fina though, so the shutdown isn't as hard, in that respect it is much like winny. I wouldn't worry about getting your girl pregnant, mine was one birth control and I was on 1g/week of test along with other stuff and still got her pregnant twice.