I'm reading a very helpful book at the moment about how to speak lovingly with people who disagree with you. Here's a very very interesting quote about abortion:
When I listened to women describe their situations in depth in small listening groups, a surprising theme emerged. In nearly every case, the abortion was undertaken to fulfill a felt obligation to another person, a parent or boyfriend. My assumption that abortion decisions were prompted by practical problems - food, shelter, poverty, clothing - was not borne out. Instead, the woman felt bound to please or protect some other person, and abortion was the price she felt she had to pay.
Frederica Mathewes-Green, Real Choices quoted in Randy Newman, Questioning Evangelism?