Levonorgestrel
"I'm 23 with no kids and had Skyla inserted 6 weeks ago. I wanted to try an IUD, because I've had bad experiences with oral birth controls in the past--moodiness, anxiety, weight gain, decreased sex drive etc. The insertion was painful but nothing unmanageable. My doctor did prescribe me Misoprostol, so I think that helped a lot. I've been really happy overall with Skyla but I've been experienced A LOT of cramps and A LOT of spotting. Out of the 42 days I've had it, I would say I experienced cramping for at least 25 days and spotting for probably 30. These symptoms are pretty annoying but I've noticed nothing mood wise which is very important for me. Another plus, I've definitely noticed a change in appetite (less) and I've lost 5 pounds."