Again, an innocent life is not so innocent, when it attaches itself to another's body and claims that body for a term of service and/or labor, instead of relying on its own capabilities, to sustain its own life.
A socialist is one who says we all have a right to live at each other's expense. A baby claims the right, until about 5 months after conception, to live at the mother's expense - the exact amount of time is debatable, and as you say, federalism and States can sort that out. Radical anti-abortionists - who say that a life becomes unalienably protectable from the moment of fertilization, regardless of the burden it places on other's lives and liberties, remind me of socialists. I regard my position as more of an individualist, in this instance. Individuals need to stand on their own, as early as possible. It should please you to know I think they can stand on their own earlier than birth, and that Roe V. Wade should be overtunred, and that third trimester abortions should be outlawed, in my State.