TweetOk Ive done some searches but I need it pounded into my head once more. Besides deca, what other AS cause progersterone gyno? The reason is I am having gynocomastia surgery at a cost of 4400, and will never touch anything again that causes progesterone gyno. Did my last shot of deca yesterday and thats it. I want to use eg and winny after surgery, and that is why im asking.