There may be as many different definitions of "Pro-Life" and "Pro-Choice" as there are people using one of those labels for themselves or others. Mine is just like anyone else's, unique and totally mine in spite of any resemblance to anyone else's. I do not seek to change, or even challenge, anyone else's beliefs but only to describe mine so that if, in the future, it comes up in discussion you'll know why I say what I do.
IMAO, both sperm and egg are alive prior to fertilization of an egg, but each contains only half the DNA required to define a human. The point of that is, that there is no point at which life begins - life is already there. AFTER fertilization, the egg contains all the DNA required, and is a human being. We recognize infancy, adolescence, and adulthood as stages of growth of a person, to not recognize the period of growth from fertilization of the egg to birth as a similar stage of growth is illogical at best. The egg may be part of the mother until she ovulates and releases it, but after that it is independent of her and can even be fertilized then implanted in a different woman and survive to birth. Also, to consider a baby part of the mother because it is Dependant on her is like considering a child part of the Department of Education if they qualify for free lunches at school. Tell me, does the mother's blood circulate in the fetus?
Having said all that, I do NOT think that issues like Pro-Life/Choice are within the domain of the Federal Government's delegated authority. In fact, I believe that those issues are specifically prohibited to the Federal Government in the First Amendment where it is prohibited from establishing a State Church and thereby a State definition of morality and/or religion. That's state in the sense that countries are states.
I may expand on this at a later date and consider the term 'state' as one of the several states of the United States, but for now I'll close with a question.
Why is it that if a woman decides to abort her pregnancy and the fetus/baby dies it isn't even a crime, but if someone kills her and consequently the fetus/baby dies the killer's punishment can be elevated from a prison sentence to the death penalty?