So there are two things here. The first of which, that female that you're talking about having dictatorial power over the fetus is in for 9 months now has to change her way of living, oft dramatically. At the end of which, the "unimaginable pain" of labor. In essence, this just turns the power wheel to giving the fetus the dictatorial power over the female, theoretically similar to being a kidnap victim. So that argument ends in a stalemate.
The second, is the child really alive? Sure at the time of inception it's "alive". Sure it can feel pain at 20 weeks, and it comes out covered in gross crying, crapping, chewing on whatever comes near it's mouth and pulling on your hair as soon as it can. Great. But does it know it's alive(self-aware)? A lot of people say no, a lot of people say yes. Going down the no path, hidden in that question is yet another question; If you never knew you were alive, is it really a problem if you're not?
Any one of us could come up with a long, involved story of that child's life and use that possibility as foundation for why that child should live... but that's paying for potential. And as everyone here on this board has learned, as well as the Jazz front office(Looking at you KOC, for Andrei "albatross of a contract" Kirilenko), paying for potential alone is a bad idea.
We are so very close to agreeing on an end result. It's nearly identical. The difference ends up being what happens if you can't find a home for that child after exhausting all other options.
So lets create a save point there, and only start again from here. We're at the last boss(hooray!)
Theoretically, what happens if the mother and/or father does not have the means nor desire to care for this child, and the parents have exhausted all possibilities(I really can't imagine this actually happening, but lets say it does), what happens then?