No flame, Enacer, but rest assured I know my stuff. Technically, if you are refering to hydroxylation of the Nandrolone, then yes it does aromatize. However, the resultant compounds are NOR-estrogens, which are much less effective at stimulating estrogen receptors than estrogen SO for all practical purposes, the net effect is NIL. And yes, Deca is a progesterone stimulator (BTW so is Tren, many times more than Deca!) NO AI is needed for either compound. I said take the NOLVA for the TEST. Aromasin may work for you but I would NEVER advise it unless you were gyno prone or cutting. Thanks for keeping me on my toes, though.