Etonogestrel
"I got Nexplanon in Dec 2013. The insertion was painless and I only had a bruise for about a week. 2 weeks after I got it, I got my period which was super light and lasted for 10 days. It's almost Feb 2014 and I haven't gotten a period since. I love Nexplanon and highly recommend it! You don't have to worry about it for 3 years and it's the most reliable form of birth control. Love it!"