Originally Posted by
Underverse
Then you're talking about personhood, and that's a construct with no set definition. And this is still not the right debate to be having, because it ignores tons of other problems that many people would set aside as 'special cases' - when in reality, we can get better resolution and come up with an idea for when it is right or wrong to abort that includes special cases in its calculation.
One simple way to do that would be to consider the potential of the fetus. If the fetus is the result of rape, and the mother will never be able to love it, that fetus loses significant potential and the morality of abortion tips in favor of acceptable. If the fetus would be born into a loving family, accepted by all and in a resource rich environment, the potential of that fetus is high. But then, if there's a genetic disease that would cripple the fetus, potential is highly diminished and the morality of abortion increases.
If you consider personhood instead, how would you deal with cases of rape, cases where the fetus has severe disabilities, and so forth? You can't. You just call them special cases. It's a poor argument, with little nuance.
Also, your assumption is wrong. First, because I don't care when humanity or personhood begins, for the reasons outlines above. And second, because I think the mother's desire to have a baby has an enormous impact on the fetus' potential to thrive, and is therefore the primary consideration to be made in these cases. Some might say that's 'pro-choice' - but not for the oft-cited reason of bodily autonomy, which is another overly simplistic argument.