Abortion is a horrible business whatever way you look at it and most women who decide to have one rarely take the decision lightly. There is nothing terribly ennobling about terminating the life of a prospective human being at any stage, let alone as late as four or five months which unfortunately is the case in many instances.
I think the fetus is sensate and can experience pain at a much earlier stage; perhaps as early as 6-8 weeks and this should weigh in people's considerations....