I'll give the 'pro-life'/'anti-choice' crowd one thing, I can certainly see the whole "a potential human life is a human life!" thing. I just thing that it can be stretched to absurd degrees (♪Every sperm is sacred♪). Just like "A potential human life is not a human life, not yet" can be stretched to babies not being humans because they're dumb blobs of flesh that are more like sacks of potatoes than human being.
Of course, where that crowd goes loses me is when they start railing against people that get abortions as contraceptive, or people who go and get them "for fun" or bullshit like that. While I'm sure it happens, I'm also sure that "welfare queens" exist, and people who use food-stamps for drugs and such exist. I just don't think they're even one percent of one percent of people getting abortions, on welfare, or on food-stamps, and that trying to stamp those 5 people and their dog out will waste time, effort, money, and adversely affect the vast vast majority who actually use the service responsibly.
Almost certainly that every person who gets an abortion does it after long, hard thinking, and it's usually the best of a REALLY bad set of options. And whether it's legal or illegal, they'll get an abortion somehow, just it'll be way more dangerous if it's illegal. It's the same thing as gay kids coming out to their parents, it's not something you do *lightly*, they've had a long, long time to think about it (less so with abortions, as there is an inherent time-limit) so any claim that it's a whimsical fancy or a passing phase is laughable.
So for me, I'm pro-choice because a) they're gonna do it anyway, so make it so that even if you think a pregnancy is a human life, you're only putting one "person" at risk instead of two by making it safe, effective, and legal, and b) human beings are so vastly different in their circumstances, that for the most part, only they and their close relations/friends can know what needs to be done in a situation, so a top-down solution in such detail as this is destined to fail. It's why I'm all for basic income as welfare instead of the hodge-podge most governments seem to go for, as only the person actually living the life can know for sure how to best and efficiently use the money to better their situation and actually survive, instead of a "You must use THIS money for housing, and THIS money for food, and you CANNOT use it to [for example] get a library card, get a swim-pass, get a bike to get to work, etc etc." Same here, there's no way to know why or if someone is getting an abortion, so leave the decision up to them with resources to make a best-practices decision. People don't need their hand-held, they just need the options that are closed to them to be opened.