abnormal uterine bleeding
"I had the Mirena inserted about 8 weeks ago.  I have had on and off bleeding (more on) but it's starting to stop now.  I gained 4-5 lbs, but it's mostly bloating.  I am told by my doctor that this will go away after my body gets used to the hormones.  I feel great on it and will take the 4-5 lbs for feeling that much better!"