No, it won't suppress LH or FSH and will even provide your body with more free testosterone since it binds strongly to SHBG. Even so, your total test probably won't increase much, it might a little but nothing significant...still, it's not suppressive like most steroids.
Anyway, this is one of the reasons a lot of guys used to bridge with Proviron only..short bridging periods usually. It's not going to provide any significant anabolic action though, largely due to it lacking the C17-aa nature...well, that's part of the reason
Anyway, hope this helps.