Levonorgestrel
"I got kyleena inserted about 3 days ago. Insertion was a little uncomfortable which I would rate a 6/10. I've never had kids so that could factor in with the amount of pain I felt. It felt like a baby menstrual cramp which last for 10 seconds. I took the day off and stayed in bed all day because there was some uncomfortable cramping but felt perfectly fine the day after. I must be one of the lucky ones who didn't start spotting right away and didn't have cramping the day after. So far so good!"