Just out of curiousity, do the doctors you work with really make an effort to determine if women with cancer (especially younger ones) have had abortions (and by a real effort I mean more than just a yes/no checkmark on a standard questionaire)?
No. Where I work, we generally work with those that are "high risk" for developing breast cancer. And yes, risk is determined primarily by checkboxes on a form. Abortions, per se, are not on the list, but it does have pregnancies vs. live births, as well as age at first birth (FYI - the older the higher risk), but no separation between abortion vs. miscarriage.