If you have reached menopause, please refrain from unnaturally having children. I have no basis for these feelings since I can think many logical reasons why someone should be able to have children. But for some reason, it seems wrong and selfish for a woman of 66 to have babies. You will be in your mid eighties when your children graduate from high school. They'll be lucky if you makes it that long. You probably won't have the energy to watch these children. Do you think it is fair to pop out kids who will likely be left motherless at a very young age? I just don't see the sense in it, and can't understand what doctor would perform such a procedure.
That's just my two cents, and I know you didn't ask for it, but it is there for the taking.