I found this article interesting.
Here's why. According to a recent Gallup poll 51 percent of Americans identify themselves as pro-life, yet only 23 percent of Americans think abortion should be illegal in all circumstances, tempered by 22 percent who think it should be legal in all circumstances. There are then 53 percent of Americans, some of whom obviously consider themselves to be pro life, who believe abortion should be legal in some instances. So, my question is, if you are willing to make allowances for special circumstances aren't you technically, by definition, pro choice?