The first time I tried fina I ran it with winny for an attempted 6 weeks. Well, I had to stop 3 weeks in because gyno was killing my chest. So I guess using winny "to block progesterone" is nonsense. That cycle was fina 75mg EOD and winny 25mg ED. On to my next cycle. I bought some arimidex and frontloaded it at 1mg ED before my cycle started and kept it at .5mg ED throughout. I ran the exact same dose of fina for 7 weeks without 1 side effect or even hint of gyno. So, to the guys who believe estrogen is the only culprit for gyno, in my case atleast, you are right.