Etonogestrel
"I got the nexplanon back in August 2015. The insertion didn't hurt at all but it bruised really badly. The bruising went away after a few days and now the only way I know it's there is I can feel it in my arm. I really haven't noticed any side effects I get breakouts but I got those before I got the nexplanon so I don't think it's causing them and I haven't gained any weight. I get a very light period for 5-7 days about every 2-3 months or so and I do get cramping my first day but nothing a few aleve doesn't fix. Overall I'm happy with it so far."