Levonorgestrel
"Insertion: It really isn't that bad. Is it the best thing I've ever felt? Not by a long shot but the best way to describe the pain is a sharp pinch and then it's over immediately.

Bleeding: About 4 months after I had Skyla inserted I bled heavily for 3 - 4 weeks. I'm not going to lie, it was awful and a lot of good underwear had to be thrown out. I thought it would never end. But one day, it did and it retrospect I'd do it over again to reap the benefits I'm currently experiencing. It's just something you have to tough out.

All in all: Skyla is great. I love it. Light to nonexistent period, no worry about having sex, no real side effects on my end. Highly recommend it's worth it."