Regarding the religion topic brought up earlier: maybe it would be better to say that people will use religion to justify their beliefs on the subject. It's clear that people follow group think and apply reasoning after the fact. This applies to everyone, not just religious people, or conservatives.
Even so, when people genuinely believe that abortion is murdering babies (as they very much do say in churches), I don't find it hard to believe at all that a lot of Christian women would think it's required by their religion to oppose it even to their detriment. I can say with great confidence that a lot of people in the Bible Belt give at least lip service to that idea, including women. Naturally, a lot of people only give lip service to their religious beliefs, of course, but lip service is enough when it comes to the court of public opinion and spreading ideas.
I guess it's possible to believe that abortions are baby murder even without a religious bent to it, but I think being Christian makes it harder to not believe that for many. If you believe in souls, for example, then it's natural to assume that souls are created or assigned at conception, because it would be kind of weird for a baby to only get a soul after some arbitrary amount of gestational time. It's just easier to think it happens at conception and that you're killing a person no matter what at that point. Or don't the Catholics believe that even contraception is contrary to God's plan, so how much worse is trying to undo his work?
I don't know. If ~70% of the population supports leaving it available, then this must not be as widespread of a view as I've been led to believe. I need to remind myself that I live in the sort of backwater country where churches also preach "Dollar General is part of the federal government conspiracy to take away your money and make you buy what They want you to buy."
On a related note, I'd be interested in seeing any scripture that supports abortion. I've seen some dubious claims like this before but nothing that really looked like it supported it. Barring explicit support for it, you have to fall back on things like "Thou Shalt Not Kill" and... see above.