Levonorgestrel
"I had Mirena for a little over 2 years now and I love it. I got it after my 2nd child. I did not feel any pain or cramping when the doctor inserted Mirena. I have been on the patch, the pill, Depo-Provera way before I got Mirena. I am 28 years old and in a few more years I am going to get this one again. I would definitely recommend to anyone."