I think it's a terrible decision for most people to have to make and I feel nothing but pity for those people who have to make it. I would never be critical about someones decision to abort or about that person themselves, unless it was someone who used it as a form of contraceotion, but I don't think that really happens.
On a personal level, if I'd become pregnant when I was younger I would have definitely considered it as an option, now I wouldn't now I'm older and would be able, if I had to, to care for a child, unless I had been the victim of a rape.