Levonorgestrel
"I had Skyla inserted 4 months ago and I am very glad I went ahead with the insertion. The only negative thing I have to say is that I have gained weight since the insertion. I've gained about 15 pounds but, it's not something I'm worried about. If I can give any advice, it would be to not pay attention to other people's ratings of this birth control method. Do what is best for YOU. You know your body and what is best for it. Insertion was painful. I won't lie to you there. I had terrible cramps for about 6 hours after but after that, it was a breeze. For me personally, getting Skyla was the best decision I could have made for birth control."