I've kind of thought about writing this for awhile and I wasn't sure I wanted to get into it, but here we go. I think this is a unique perspective on the issue.
I get a newsletter every few months from Edgar Cayce's ARE (Association for Research and Enlightenment). One of the sections in this newsletter is one where people write in and ask questions about the readings; what they mean, if there are any readings on a specific topic, or what have you. A few months ago, someone wrote in and asked what Cayce did say or would have said about abortion. One of the things that Cayce specifically said was that the time of the soul's entry into the body was usually either a few hours before or a few hours after birth - though it was possible to go in much earlier or as much as four years later (interesting thought!). However, anytime at, before or after conception, there may be one or more souls hanging around and evaluating the conditions that an incarnation at this time, with these parents, etc. would offer.
There was a case (I don't quite remember the specifics and I can't find the newsletter, so forgive my liberty with the facts) where a woman, early in her pregnancy, decided that an abortion was the best option, but at the same time, she didn't want to do it if it was a horrible thing to do to the child/soul. I don't remember if it was a rape case or she was ill or what - but it was a valid reason to want an abortion (though to insert my personal opinion, the acquisition of any unwanted early pregnancy is a valid reason to want an abortion). So anyway, this woman was advised to pray and to meditate in an attempt to communicate with the soul that intended to incarnate through her, and let the soul know that she had nothing against it, there was nothing wrong with it, but that the time was simply not right. Following these things, she had a natural miscarriage. If I remember correctly, when she became pregnant again years later, married and all of that, it was that soul that came back to her.
Sounds pretty slick to me. People would probably consider me to be callous about the issue of abortion, but I do not place priority in the physical. I do believe that Cayce was correct and that the soul does not go into the body until late and so until then, it's a hunk of the mother's flesh. But let's say that that's wrong. Say when you abort, you kill a baby and break the physical-spiritual bond, releasing the soul. Where does the soul go? I would say that it is then free again to incarnate into another body as it chooses. The soul hit a dead end. Who cares? There are plenty of other roads.
The question for me is, ideally, one would want to try to contact the soul and go about things spiritually, naturally, with consideration, etc. But is that really necessary? Is the pill in some way offensive to the soul? Well, it seems to me that if the intention to do the incoming soul good, whether by birthing it no matter the unfortunate circumstances it might come into, or by guarding it against those, I think the soul (and God!) will know and understand that you are trying to make the best choice.