Levonorgestrel
"I had Skyla out in 2 months ago. The insertion was a bit painful, but it was over quickly. I had some moderate cramping for a couple of days and slight spotting. At my 1 week mark, I was having heavy cramping and some sharp pain. I checked and my doctor checked for my strings but they couldn't be found. I ended up going to the ER having an ultrasound and a CT scan to see if the Skyla was still in my uterus or has moved elsewhere into my abdomen. The nurse started an IV on me right away. She said it's in case they need to take me to the OR. They hadnt even done the scans yet, but the doctor told me they've had many women come in with IUDs that travel outside the uterus and into the abdominal cavity and it require surgery right away."