Etonogestrel
"I had Implanon inserted May 2010, immediately after high school.  I chose Implanon because I am quite forgetful and the thought of hassle free 3 year birth control was like heaven!  Side effects? Lighter period slight depression and moody but nothing serious! Other than that the Implanon is perfect! I've had it removed today and I'm considering an alternate method for birth control.  ONLY because I don't want the implant for another 3yrs, yes you can have it removed before then but I want to go through the process again."