Just a brief note on the science and viability. As of now, not in the future, a type of mouse stem skin cell has been used to grow a fine and functional mouse. Mouse embryology differs from human (human is more complicated), but it's only a matter of time before the same thing is possible in people. When it is possible, in effect, every cell in your body could be another viable human being. Are you going to hold funerals for every cell destroyed in a scraped knee? Viability is a nonsense standard whose illogic is made more obvious with each medical advance. It's pretty obvious after even a simple thought experiment: when can a human being be forced to donate organs? "What!" you say. "Never!" But that's exactly what's done to a woman who's forced to continue a pregnancy against her wishes. The only reason it seems like a new thought (if it does) is that the female human being carrying the pregnancy doesn't count for much. Viability is an argument only if the pregnant woman is a non-person without standing to decide her own care. Otherwise, it's up to her. If she feels that abortion is murder, then she won't have one. If not, then not. The point is that unless you're willing to assert that women are less than people, it is up to her.