I have also gained weight after getting the mirena, I got it when my twins stopped nursing at about 3 mths. I had lost 25 plus pounds that I had gained during pregnancy. After getting the iud inserted my weight went steadily up untill I gained the 25 back plus about 15 more pounds. No matter what I do exercise, diet ect. I still am gaining weight. I have almost complety lost my sex drive and feel very depressed most of the time. When I asked my doctor if these syptoms could be related to the iud I was told that these were just postpartum depression, but my boys are now 16 mts old and I am still having these problems. I think I should look into getting it removed.