Rape Abortions and Paternalism

Rick Santorum's argument against allowing abortions in the case of rape apparently includes the following: that it would "put her [the woman] through another trauma." I don't mean to comment here on the merits of the overall issue, but if our concern here is for the woman, surely we should let her decide? No woman who doesn't want an abortion gets one (and if they do, that's a different subject entirely); how do we make the woman's life better by denying her the choice of whether she prefers the trauma of an abortion to the trauma of bearing her rapist's child? Again, not commenting on whether the woman should have the right to make that choice vis-a-vis the fetus (here), but if we're concerned for the woman we should let her decide what's best for her herself, right?