Mirena
"The whole thing is absolutely worthless. What people don't share is how to become pregnant after that.  Seems to be a serious problem.  I won't even mention this madness with spotting, constant cramps and bleeding for 2 weeks. Also the pain that comes with the procedure. I've had a PID( get educated on it before waving it) right  2 months  after insert. I was aware But refused to believe. Fallopian tube inflammatory as a result. Got that thing out 4 years ago. Still no kids. A woman that advised me Mirena ended up with endometriosis that appeared due to IUD after being taken out. They've been trying to have kids for years. She is officially infertile now. Everything worked out perfect though for my best friend until they decided on a baby. I regret it"