Wow, that's good to know guys. Thanks for the feedback. I don't get around too many boards or even enough threads on this board to have heard that, but it's intresting info. Nolva occupies estrogen receptors and modifies gene expression to improve gyno, but a competative, steroidal AI actually starves the breast tissue of the estrogen it needs to support growth.
Neuromancer, was your gyno longstanding too, or acute from a recent cycle?
The only problem with M4OHN, is that it is a mild 5-a-reductase inhibitor, and DHT is oppositional to estrogen. So if it cut your DHT levels just enough to allow estrogen to get the upper hand, gyno could result. Hyperprolactinaemia, can result from estrogens direct effect on the pituitary especially if the gland is already acting sluggish. The hypothalamus need not even be involved, and in that case the dopaminergic would have no benefit at all. However, on paper at least, M4OHN is as androgenic as roughly an equal amount of DHT, so that shouldn't really matter, unless the dose was just too low at 8mg to compensate. The 4-OH sub is now thought not to interfere with AR binding as much as it once was, but is still thought to provide steric inhibition to progesterone binding proteins. So I doubt it's an intrinsic progestin, but I need to update my knowledge in this area and get back to you with a definite answer. From personal experience, progestins have never seemed to initiate or agonize gyno with me. Test has always been the worst, but tiny doses of letro completely prevent it.
I'd say try Nolva, or based on the new info from AcuDoc & Neuromancer, you could go with Rebound. Either one would be a valid place to start. Reinforced anecdotal accounts hold more weight with me that book protocols. Life is just like that, so I'll follow this closely.