[Lotus]

It's the other way around, meaning the estrogens receptors were already present (at birth) lower testosterone (imbalance) also has a lot to do with gynecomastia.

Yes, that's what I meant, but might those estrogen receptors have made me more responsive to even a short regimen of PM?

A heightened response certainly makes sense, I like to think we're training those receptors to do our bidding (breast building). Keeping low concentration of PM throughout the day keeps a therapeutic curve benefiting hormonal release. (i.e. 100
to 200 mg every 3 hrs for guys, half that amount for the ladies), just my opinion though.