Etonogestrel
"My family has a negative history with birth control (mother, aunt, cousin and sister all tried and couldn't stay on it) however my periods were always extremely rough so at the advice of my doctor I got Implanon to help balance the hormones in May 2013. So far so very good. I have had one 8 day period since then followed two months later by a 4 day period. Both were extremely light and my symptoms were either dulled considerably or nonexistent. It was incredible!  Sex drive did not change at all and I had no problems losing weight on it. I've gone from a size 10 to a size 6 with healthy eating and exercise. At times I feel some water retention but that typically happens around the time I would have started my period."