Levonorgestrel
"I went to have the Mirena IUD removed 1 1/2 years after placement and my ob/gyn couldn't find it to remove it. I have had an ultrasound that turned up nothing and now need an abdominal xray to see if it can be located that way. My insurance won't cover any of it until my deductible is met,  so I have to come up with $1000 just to find out, and if they find it, I'll need surgery. This "migration and spontaneous expulsion" are more common than the company says. "