Levonorgestrel
"I posted when I first got skyla (almost 6 months ago April 27,2017) and wanted to share my experience. I spotted for a little over 3 months which wasn't fun since it was summer. Usually wore just a panty liner. My periods definitely are a lot longer close to 10-11 days but lighter than they used to be. My bf can feel the strings in certain positions but says it just feels like scratching. (He can suck it up since I'm the one who has it inside them). Other than that I've had a positive experience. I've been on the pill twice and gained significant weight both times. Haven't gained weight or had acne appear since getting skyla."