Don't like abortion per se? Don't think anything will be really accomplished by making it illegal though? Think that a person would be just better off not faced with the want or need to get one in the first place even IF you might support abortions in all cases? This is the stamp for you.
Better prevention, education, better medical care, and more medical advances are what people in favor of pro prevention promote. It's common ground, and the grey area. Pro prevention looks forward to people not having to be faced with the choice of abortions to start with. Thus eradicating abortions or severely dwindling the number.