Currently using both the mast-e once a week and 75mg mast prop eod. Just kinda how it worked out. Anyway I was doing some researching on not just masterons anti-estrogen effects but what about anti-progesterone. Both can cause the same effects as estrogen. say you added some tren to your cycle will masteron help with progesterone issues as well. From what I could gather from the web is yes it affects both hormones estrogen and progesterone. How much affect is unclear. At what dose of tren do you have any progesterone sides if at all? Low dose high doses?