Why does society get to decide about one woman's uterus?
Why does society forbid a person from killing his or her child, in their house? Why does society get to decide about what happens in any person's house? Because killing a person in that house is a violation of that person's rights. Ceasing the life of the fetus is no doubt a violation of the rights of that fetus. Society and the government can, and do, forbid activities that violate the rights of others.
If a woman decides to have an abortion, there isn't a yes or no question that gets applied to me.
If any person decides to kill another person who doesn't belong to one of any of the groups, classes, races, etc. to which I belong, there isn't a yes or no question that is applied to me either. It doesn't affect me any more than an abortion affects me. It's not my business whether a person kills someone. There are many things that do not "affect me," but that does not mean that it does not affect someone. The fact is, an abortion affects the fetus, possibly as much as it affects a person killed in the outside world.