Until you've had Mirena how can you comment on it? How would you really know whats normal and what isnt if you have experienced it? I think we all understand your concern but dont start saying "our bodies" and "our health" because your body nor your health is at risk. We all know the information and talked to our doctors before hand so we know all possible side effects. There is risk and reward in things we do everyday like driving to work, flying on a plane, even cooking. But somehow we have made the decision to do these things because we need to make a living even though we could get in an accident, we want to go on vacation even though there is a possiblity of crashing and we're hungry even though we could burn ourselves. Mirena is just an example of another decision we've made and just like everything else in life...anything could happen.