I'm missing your logic. A miscarriage is a tragic natural event that does not involve the intervention of another person.  An abortion involves the intentional intervention.  Are you stating legally it would be impossible to separate the two upon investigation? This is no different than my above example of  an elderly person dying of natural causes or the intentional intervention of another by euthanasia.  I have investigated numerous natural deaths and an autopsy clearly would differentiate  between the two. A suction abortion or dismemberment abortion would clearly be differentiated from a miscarriage as well.      Are you in favor of 1st trimester abortions?