Levonorgestrel
"I've had 2 children so the insertion could be described as a mild contraction feeling. Got through it. Take pain mess before and after insertion and plan to take a few days off. Bad cramps and spotting for about 6 weeks but then I've not even had a period now and it's been almost 6 months. So happy with it and acne a bit more but no horrible side effects and it's been wonderful to know I'm not going to get pregnant unplanned again. Takes the worry away and no periods really rocks!"