Etonogestrel
"I got the nexplanon bar in February. The insertion of the devise didn't hurt at all. My arm was just kind of sore the next day like someone pinched my arm fat. The bad thing was I had my period for 3 months, sometimes super heavy and sometimes barely there. After that time I haven't had a period since and I'm clearly not pregnant so I'd say it works pretty damn good as long as you're patient."