I'm with Kreuzfidel here. To me the idea of having to stop is silly when cis guys get surgery all the time. Yeah, T maybe raises blood pressure and blood count etc...just like cis guys! Lol. My BP is 110/70, and all other blood work is well within normal ranges, so I wouldn't buy that excuse myself. There's nothing I can even think of in terms of the oil suspension that would cause an issue, I honestly think the idea is that the difference in blood and blood pressure is their reasoning but if they don't castrate cis guys, it's obviously not that huge a deal.
A lot of research on stuff like this is dubious at best. It's the same as the idea that we need hystos because of increased risk of cancer, yet this is a lie as there's no legit research that shows that's a problem at all. It's assumptions alone that can't be proved. If they've done research and trans guys recover better without T in a small number of cases, it still wouldn't convince me to stop. I took T knowing it would potentially reduce my life expectancy, cause bad changes in lipids, and make me bald. If they had research that showed that sometimes women recover better from surgery than men, I'm not going to stop T because of that. I'm in this for all the bad that comes with the good. I don't think it should be the surgeon's decision here. I didn't have to stop, but even if I was told to, I wouldn't, unless I had specific medical issues that would make a big difference, and honestly, I can't even think of what that would be! How would they know anyway? That would make me dubious of any research too. How were they sure the positive results were from guys who really did stop?
After a hysto, I'd say you couldn't stop anyway. That'd be more counterproductive than any good they could claim.