I'd argue that the only valid powers of government are protecting life and private property.  From the moment of fertilization, the baby is a life as defined by every biology text book and it is human because of its unique human DNA.  Killing a human life for convenience is wrong.  Period.  You talk about abortion saving a life, but that is basically never the case except in the case of a tubal pregnancy.  In that case it makes sense because the choice is between two deaths or one death and we should want to minimize death of human lives.