Where are the prochoice on elective amputations?

There are people in the world who want healthy limbs amputated, some of whom will go to great lengths to achieve this goal, sometimes dying in the attempt. If the prochoice movement is indeed about doing whatever one wants with one's body, then sooner or later they're going to have to deal with the growing problem of apotemnophilia -- the desire to amputate a healthy limb.