I'm adamant to everyone around me that I don't want a kid and I hate them, but in truth although most children annoy and scare the bejebus out of me, I think that one day I would like a child, I just know that in no way, shape or form, would I be able to carry it myself. The thought of it not being biologically mine doesn't really phase me, families in my opinion aren't formed from blood, but from the people themselves (that probably has something to do with my thinking that one of my old teachers was a better father in two years than my dad has ever been, but that's beside the point).
As someone who likes women though, even if I never transition, the only problem that could occur would be if they were unable to carry it themselves, either through a medical or emotional reason, in which case we would have to consider other options, such as adoption, which I think I might consider anyway, childhood is one of the most precious times of someones life, and it can't be relived. I would feel so privilaged if I could be a good father to someone.
But to carry them, whether I transition or not, is a no. Never. Kudos to the guys who can stomach it though.