There is no such thing as a "post-birth" abortion. If you mean "late term," that's like, when they discover that the baby is already dead in utero, or something like that. The stories from parents who WANTED their baby only to find out it was dead or dying or whatever the particular situation was are heartbreaking. It's purely medical at that point - either for the baby or the mother or both. Nobody having an abortion for other reasons is waiting until that late to have one.