Levonorgestrel
"I have been very happy with Mirena. It was inserted at my 6 week post-partum appointment. I was nervous but felt nothing. It felt like a pap smear.  I did have spotting for about 6 weeks after. I started a diet program two weeks after insertion, and I have lost 21 lbs in the last 6 weeks, so don't believe it when people tell you that they gained a whole bunch of weight after insertion. 



I have no complaints, and I would recommend Mirena to anyone."