Levonorgestrel
"I got the skyla in April of 2015, it was extremely painful experience and really uncomfortable. I've always had really bad cramps so the doctor suggested this because it can lessen cramps and I didn't have to remember to take something everyday. I am about 6 months in and I've had extreme cramping every time for two weeks. They come on in attacks. The bleeding is a lot lighter and it's pretty effective. But it's almost not worth the pain."