Etonogestrel
"I had my nexplanon implant put in at the beginning of February 2014. About a week after I started spotting and haven't stopped since. It isn't as bad as I had expected, I just have to wear pantiliners everyday. The only other side effect I've experienced is a total lack of any sex drive whatsoever. Other than that, I haven't had any other issues with the birth control and am very satisfied with my choice of using Nexplanon."