Being 56, 32 years post-op, and twice married, this is something I have thought about many times over the years.
Yes, I love children. I love babies and children SOOO much that I try to avoid them because I felt it would probably never be part of my life.
When I was young (before 30), I would have KILLED to get pregnant and have a child, but I know now that there were two primary reasons why I felt that way; first was that it would have "proven my womanhood" (NOT a good reason to have a baby!), and, secondly, it is a part of every woman's psyche to want to nurture and coddle the young - basic biology. Heck, when my niece was an infant, I'd lactate just from being around her (and that was before transition).
Intellectually, I could see no reason for wanting to give birth (aside from selfish reasons) when there were so very many children who desperately needed adoptive homes or foster homes.
My sister and I were raised in a very bad environment and I swore I would never bring a child into a home unless there was a secure, loving atmosphere in which to raise him/her.
I always thought that, when I got married, when the time and the situation were right, maybe I'd adopt a couple of older children who REALLY needed a home, but years went past and the situation was never right so the family never happened.
I did spend some time on staff in a private school for troubled kids and worked with a group of girls in a family unit. If I was temped by parenthood, being "mother" to 6 delinquent teenaged girls for a year is a strong does of reality!
Regrets? Not really. I look at the world that today's babies will inherit and I don't think I would be confident sending a child into that future.