We have to treat "to protect life of mother", rape, and consensual sex as three different cases.
There is ZERO reason why a pregnancy should go more than a few days in the case of rape...I mean seriously. IIRC isn't it standard medical practice to offer plan-B to rape victims in the hospital? In my opinion, preventing embryo attachment is fundamentally different than "abortion".
In the case of protecting the life of the mother, that is a no-brainer, and only really radical pro-lifers disagree.
As for pregnancies resulting from consensual sex, AGAIN, in this day and age, there is no reason an unwanted pregnancy should happen. But in any case, I don't see why it should be further along than a few weeks at most, at which point, no brain waves. Waiting any longer? Seriously, why? Did you have something more important to do?
IMHO, I follow the "legal and RARE" attitude. Basically, abortion is a horrible thing, and in this day and age, with the availability a huge variety of highly effective birthcontrol methods, of pretty reliable early pregnancy tests, plan B (which is only an abortifacient to those of extreme viewpoints...it's not RU486), etc, there is no reason an unwanted fetus post a few weeks of development should need to be aborted, except in the "save mothers life" addressed above.
Anyway, just my opinion.