Etonogestrel
"I got implanon February of 2015. 
Also I am 4"11 100lbs when I got it so I was fairly tiny before. But the day I got it in my arm I had bruising for a whole month. Didn't get a period still haven't. My moods vary from super bitch to quiet and tired. I eat ALL the time but can't gain any weight. In fact I've lost 10 lbs since being on it and I hate it. This thing has made me moody. Have dry skin. I have lost weight and hair. Besides not getting pregnant it's doing its job."