I'm actually anti-abortion on religious grounds but am pro-choice on political grounds. I do believe that the soul is created at the moment of conception, that early and abrupt deaths halt spiritual development (also a main reason why I'm mostly anti-war and anti-death penalty), and that abortions as a form of birth control is inappropriate due to the two previous reasons.
HOWEVER, I also understand that not everyone else believes what I believe, that there are complications that arise in pregnancy that abortion resolves making it a sound medical decision in those scenarios, that organizations that provide women's health in general and provide a needed service to their communities are necessary for the physical, emotional, and spiritual health of society and shouldn't be defunded just on the issue of abortion, and that like the right to guns, gay marriage, etc., the government shouldn't have blanket restrictions on personal freedoms.
So while on an individual moral level I'm against abortion, I think it's important I set that value aside if evidence and data suggests that it is beneficial on a wider scale. That said, I'd much, much rather point to alternatives whenever possible, such as promoting safe sex, encouraging adoption as an alternative, etc.
I can bet you easily that I'm not alone in this mentality.