yes, that's true about prolactin. in the case of tren, it's not the progesterone that's secreting prolactin, but the binding of trend to the progesterone receptors and it's these activated progesterone receptors that cause the secretion of prolactin. however, the fina dick is most likely due to the strong binding affinity of tren to receptors in the hypothalamus, causing suppression of GnRH and natural test. prolactin may also play a role as well.