birth control
"I have been on Implanon since 2007. At first my left arm where it was inserted had pain for the 1st week but for the whole year it was great. I didn't experience any of the side effects. Now that it is 2010 it is still in my arm, but my menstruation cycles skip a month and then I get it and when I do its heavier. I'm not sure if I gained weight because of this product, but I was naturally always skinny before this product. I exercise and eat normally as I used to so I'm not to sure if it is the Implanon implant. 
But I love this birth control very much because it works well as far as not having to worry so much about it, but I have had mood swings especially now for no reason and a little lower sex drive."