Though vaginal sex and giving birth, etc. aren't quite for me, I would still really like to have have one or two kids as I grow up. And IF I would get kids, I want them to be mine, not adopted, but genetically mine.
Chances are that would be a tricky business (unless... can they combine two egg cells into one baby nowadays?) , but I'm still considering to get them frozen or something before I would start hormones, just in case, y'know.
Still not sure though, but I'd love to be a dad sometime in the future.
Maybe you could get your sperm cells stored or something, so you could use them if you happen to end up infertile (no idea how large the chances are. I heard of plenty people who transitioned and still gave birth/were fertile though)