Lol, no one is "pro-abortion". It's not like anyone who is pro-choice goes "LOL HAY I'M GONNA ABORT THIS BABY SOUNDS LIKE FUN Y/Y?" I'm pro-choice but I think abortion is a horrible thing. It's not like it happens once and goes away--most people who end up having an abortion, be it because they didn't want the baby or because their life would have been in danger, etc. either regret it or are just emotionally unstable or traumatized because of it for years and years afterwards. It's not a light thing.
I'm pro-choice and for legalizing abortion if only because it'll mean that instead of having to go to back-alley underground abortion centres (or, god forbid, trying it themselves), there will be clean, sterile clinics for it so that the woman is less at risk. I realize this means abortions will be closer to being more commonplace but... well, I dunno. It's kind of like those drug clinics in some places where they'll give you sterile needles for whatever you're illegally taking so that you aren't just reusing needles or sharing them, etc. since that's so dangerous. Yeah, it's not exactly a "NO DRUGS ARE BAD STOP USING THEM" black and white approach but... I'm still all for it. :/ I know it's kind of a harsh comparison to make but there you go.
I'm also one of those people who sits there thinking "well, if the woman is just getting knocked up and getting an abortion to curb responsibility of a child, that's wrong... but those who were raped, etc. shouldn't be forced to bear the child" but that'd never work so I forced myself to pick a side regardless and I'd rather be pro-choice. The option is there if people need it and if they don't, they can ignore it. (That seems to be my philosophy on most things, haha.)