Etonogestrel
"I had Implanon inserted in Summer 2009. I bled almost constantly for the first 3 months, and I almost gave up. I also noticed that I would get headaches if I didn't eat a good breakfast. The headaches stopped when the long bleeding stopped. My acne is a little harder to control now that I'm on Implanon, but its not bad. Now I have light, 3-4 day periods, usually more than a month apart. No weight gain, I've been skinny my whole life though. No need to use a condom! My long term boyfriend and I really like Implanon, it really is a 'no worries' method for us."