I could never abort my own baby...however I say that while not facing a pregnancy that is risky to myself, or would end in death to the child anyway, etc. So sitting from where I am, for myself, it's pretty clear, but that could change based on circumstances. What I could never do, is allow someone else to make that decision for me. That's the point of choice...not that the choice is always to abort, but that there's the freedom to look at options.
I'm not trying to throw a lot of extraneous information in here, but to parallel...what people forget is that prostitution, whether legal or not, happens. Abortion, legal or not, happens. Drug use, legal or not, happens. Not to be extremely liberal here, at least the difference when you legalize such things, is that you have a measure of control and offer safety to those involved. (i.e. we have a safe needle clinic in my city, to ensure that the people who are 'partaking' of illegal substances will not contract diseases from dirty needles.) Abortion clinics, while I personally don't like that they exist, are a much better alternative to a knitting needle, bleeding out, etc.
In a perfect world, there would be no need for abortion or measures around drugs/prostitution etc., because everyone would be educated, and be able to have access to the proper safety measures, birth control, etc. Right now that's not the case, so why penalize those who grow up disadvantaged, uneducated, abused etc. Why perpetuate the cycle?
My 2 cents. Actually more like 4.