The real conflict in the abortion issue is between a value - the right to choose whether or not to have the child - and a moral dictum - don't kill other humans. The more here, even, is flexible and relative. "Thou shall not kill" really means, "don't kill productive, contributing members of your own society that aren't a threat to your safety." If it was not relative, then no "Judeo-Christian" person could ever go to war or execute someone.