I think abortion is fine. Sometimes getting pregnant could be a mistake. When it is a mistake, then it would be irresponsible of the woman to keep the baby. I'm not a parent, but I can still tell that being a parent is the biggest responsibility ever, and becoming a parent should only be something which you want to happen.
If the baby was planned but something happened during the pregnancy (break up ect) then I think it is still responsible to have an abortion. For example if the woman was with a man who was offering a stable life for the baby, but then leaves, then IF the woman wants an abortion, then that's right. I'm not saying a relationship is more important than the baby, but relationships provide a good life for the baby - NOT in all situations.
So basically I think it's wrong for a woman to keep a baby if they don't actually want it.
I get that a lot of people will disagree with me, and that's fine, and I'm not saying that everyone should agree eith me either