Levonorgestrel
"I'm 40 years old with two teenaged children. I was tired of taking a birth control pill daily, and had trouble remembering to take it sometimes. I had the Mirena inserted last month, and it was a painless procedure. I had some minor cramping for the first day or two, but no bleeding. I did not get my period this month and I'm hoping I don't get one ever again! I highly recommend Mirena."