I gave birth to two (large - almost 10lbs each) babies, five years apart. Both were overdue, both were induced, both were 20+ hr labours, with one I had tearing and with the other I had a large episiotomy (four full-length snips of the scissors - "third-degree mediolateral"). Those of you who mentioned the horrible things childbearing does to the body, you are *absolutely* correct. And that's not even counting my two miscarriages.
At the time it was part of the "try to do good in this 'woman' role" thing... That being said, I'm so glad that I have my daughters, they are the light in my life, the anchor that rights my keel in difficult times, and they absolutely challenge me and produce growth in me as a person. Plus, I love the heck outta those kiddos, and don't even want to imagine my life without them.

Would I ever do it again? Parent a child, absolutely. Carry and deliver one, not on your life. Which I had decided a couple years even before I had come out to myself as trans. Even with my ex-fianceé, at which time I identified as a lesbian, I absolutely wanted to be the "father" side of the parenting partnership, and even went so far as expressing to her how I wanted to inseminate her with donated sperm and a strap-on rigged with a catheter to get the most "natural" experience possible. I also expressed disappointment that I didn't have my own sperm to use in the process. (Um, *how* did I not figure this out sooner?? lol)
For future, would I still want more children? Maybe one more as long as I'm not the one bearing that child, and again, I'd like to use the jerry-rigged-strap-on method mentioned above. I'd be happy emotionally with adoption, but I just don't see myself ever being able to afford adoption (especially not within my child-raising years). That's the same reason that I don't think in vitro (for my partner) or sperm-bank sperm would work (known-donor would be preferable anyhow), but I'd probably be happy to consider surrogacy (though I'm not sure what the involved costs would be).