Levonorgestrel
"I first had the Mirena inserted in 2008 about 6 weeks after I had a baby.. I had always suffered from unbearable cramps, irregular long MISERABLE periods.. So I thought what the heck I'll get this awesome little thing and kill two birds with one stone. I LOVE it!!! I literally haven't had a period or spotting since the day I got it put in and have not even remotely had a pregnancy "scare" I have recommended it to many people, but it doesn't work the same for everyone. Insertion both times (I'm 3 years into my second one) was easy. The first time I had normal period like cramps the day of, and the second time they just switched out the old for the new and I had zero symptoms. Aunt flow didn't even come. I highly recommend at least trying it!"