My personal opinion, is during the last trimester when the fetus would be viable outside the womb. But I can see how there could be exceptions to this for a variety of reasons. It is complex.
What I find somewhat funny is that there is another new thread here about food stamps. Here we have wingnuts bitching about abortion and at the same time bitching about food stamps. Wingnuts don't want to help anyone get contraceptives, want to force every women to carry the pregnancy to term, and if they do and they can't afford to, tough shit, you're on your own. I guess in the religious zealot wingnut mind, that's God's punishment for having sex out of wedlock.