I don’t know if I agree with that. I have no idea when a fetus becomes a person with all personhood rights, except that I am certain it happens somewhere between the moment of conception and the moment of birth. But it really doesn’t matter to any of my beliefs - I don’t think abortion should be legal if and only if the fetus doesn’t have all personhood rights, nor do I think abortion is morally acceptable up until the moment of birth because that’s when the fetus gains personhood. And to be honest, I’ve never been entirely sure why the debate does seem focused on that point. Nobody can know for certain exactly when that point has arrived but legality doesn’t need to depend solely on that point - it can be illegal to kill an animal even though it is certainly not a person. And morality need not depend on that point either- it can be moral to cause a person’s death in some situations but not others , just as having a vet euthanize my sick dog might be morally acceptable while shooting my dog simply because I dislike it might not be.