A lot of people, especially politicians, who call themselves 'pro-life' believe that abortion should be illegal, "except in cases of rape and incest." But very little thought is put into how such a policy - an abortion ban that made an exception for rape - would be put into practice. How would we determine which pregnancies were the result of rape, and which weren't?
As it turns out, there's no acceptable way to do this. The "no abortions except in cases of rape and incest" position is bogus, an attempt to soft-pedal the real goal of the anti-choice movement: the criminalization of all abortion.