There are people who believe that women have the right to choose what to do with their own bodies (whether that choice means birthing 18 children, having an abortion, giving a baby up for adoption, spending a fortune on fertility drugs when thousands of living babies go unwanted, or becoming pregnant at 66), and there are people who do not believe women have that right.
And between those two groups, there is no room for "common ground"—any more than there is room for "common ground" between those who support marriage equality and those who believe gay people are condemned to hell. We don't sit down and dialogue with gay-bashers racists or any other kind of bigot—we pass laws that prohibit their bigotry from infringing on the rights of others. This is a basic tenet of rights-based democracy. Why, when it comes to women's right to choose, is this so hard to understand?