Deca and gyno

[nydj66]

there is no such thing as prolactin and progesterone gyno

With all due respect; gyno development is simply not well enough understood to make such a blanket statement.

Experts believe progesterone can play a roll and many endocronolgists will prescribe progesterone (along with estrogen) to develop breasts in male-to-female transsexuals.

I agree that estrogen MUST play a role in gyno; and deca does aromatize (to a lesser extent than testosterone). But progestins from the deca could very likely be the problem in a susceptable individual.