My thoughts (I am prepared for people to disagree) is that it is very, very bad.

Conception may have already happened, the embryo just hasn't embedded itself in the uterus. Thus aborting a baby, IMHO.

I'm just a hippie christian, and you can say so if you like. I don't like the regular birth control pill, either, because it can do the same thing. (And IUD's ONLY work this way!)

But then again, I'm married and WANT a baby. Maybe I'd feel differently if I were in a rape situation? Probably not, but I don't know.