Just had a health scare...I had the Mirena IUD inserted three years ago. Six weeks ago my breasts started leaking and I developed lumps; there is no history of breast cancer in my family. Went to the doctor a week ago, the nurse practitioner said it can't be the Mirena because I had it for three years. Went to the cancer center today for diagnostic 3D x-rays and ultrasound. Fibrocystic breasts with lumps and discharge due to the hormones in Mirena. You may want to get the non-hormonal one.