A whole lot of effort put forth there, seems you're pretty invested.
I don't know, dude....the slicing and dicing of the concept that "all lives are precious" certainly cannot be determined while still in the womb, can it. Could be a potential serial killer, could be a potential inventer, heart surgeon, or the potential mother/father, or potential grand mother/father of a potential heart surgeon. It's kind of like a box of chocolates, you never know what you might get. Except much more complicated. Using serial killers to support pro abortion is a lazy argument.
Speaking of grand mothers/fathers, it wasn't that long ago that folks had quite a few children born to a family, survival rate to adulthood being a factor. In fact it was because of that factor people would often bear many children, even or perhaps especially the poor. The station or perceived worth children are born into is irrelevant to potential. Perhaps potential is at the heart of the miracle. It is the miracle, beginning at conception. Who holds dominion over that potential, that miracle, other than the miracle itself. If we remove emotionalism and religious zeal, so be it. I don't think it is going out on a limb to suggest a parallel to the concept of self determination.
Cold calculation, we are below replacement rate in the US, 1.6, or so. Nations who follow such a course are not busy being born, but busy dying.