I think Mr Walk can help you...
All I know, a friend of mine got gyno from anadrol while using tamox and some Adex.
WELL... made some google and found this:
They act as progesterone receptor antagonists in preventing own progesterone receptors and can act to fulfill its role , thus increasing prolactin levels ( something that causes increased prolactin levels are low progesterone) . The increase in prolactin does not necessarily mean you will develop gynecomastia according to the survey . The study ( J Clin Endocrinol Metab 1988 Jan; 66 ( 1 ) : 230-2 ) showed that progesterone with estrogen works synergistically to stimulate breast production. According to ( Clin Biochem 2001 Nov; 38 (Pt 6): 596-607 ) , prolactin only have a stimulating effect on gynecomastia in prescenÃ§a of high circulating estrogen levels.