Levonorgestrel
"Had Skyla inserted 2 weeks ago & it hurt! Went in thinking it'd be tolerable but I was wrong (haha). Pain would have been 8/10, it felt like horrible horrible cramps. Entire process lasted probably 5 minutes, with actual insertion around 30 seconds only - but definitely worth it. I've been on the pill for 2 years so for something longer lasting like this and not having to take a pill every day, I love it so far. I've also been very lightly spotting for 2 weeks & it just stopped 2 days ago. Strange thing is I've gained 4 lbs since I got it even though I've been exercising a lot more since. I'm not sure if it's related to the IUD, hopefully not.. My bf does feel the IUC during rough sex however it doesn't seem to bother him much."