Quote Originally Posted by vitor
No, Progesterone is without a doubt a a culprint in gyno in many cases.

Considder this: There are plenty of people who has gotten gyno on Deca only cycles. Deca aromatse slightly to estrogen, but on a deca only cycle, estrogen will normally decrease from normal values anyway as testosterone production shuts down and cant aromatse to E anymore..

Progesterone probaly cant cause gyno if estrogen levels are Zero, but it doesnt take much imo if someone are prone...
are u sure its progesterone instead of prolactin?