Levonorgestrel
"This is my second time having the Mirena. I got one after my first child and it was PERFECT! I had no problems and only spotted every couple of months if that. I had no pain whatsoever when it was inserted. I got it removed after a year because we decided to have another child. This time around is kind of different. I go in for my check up in 2 days and they may have to remove it because I'm bleeding non stop, cramp everyday off and on to the point I cry and medicines wont take them way. I have mild mood swings nothing major. I haven't been able to feel the strings either. BUT I would recommend this to every woman because not everyone has a trouble with it. It's a good form of birth control and it works."