I'm not for a second saying any woman would get an abortion due to being perceived as fat. It was a bad example, but the point I am making is that bodily control "could" apply to this case. In my opinion, in such a case, the life of the unborn would be more important. That's why I don't like the "my body, my choice" argument. I would prefer if the argument and reason supporting abortion was on scientific grounds, ie the point that a life becomes a human life.
In those cases I think the life of the woman is paramount and the woman's life should come first. However, it would be impossible to define a list of risks and illnesses that would be covered. Also, sometimes the diagnosis can be subjective so would we need a team invloved for every case? Much too difficult and time consuming.