Etonogestrel
"I've had my Implanon for about a year now and I love it. I've had one period that lasted about a week, with very light bleeding. I do however get everything that comes with a period, the cramps, mood swings, all the emotions, everything but the bleeding at least once a month, as if I were on my period. Other than that I have gained weight but like most people that's not just because of the birth control."