Hi there. I haven't found many other people with a persistant, low-grade fever as a possible side effect of the Mirena. Tarbaby was one of them, but I didn't find a posting in the last 22 months. She said that she had a low-grade fever for almost 7 months. Was wondering how she was doing and was wanting an update. If you're out there, Tarbaby, let us know how you are! Take care!