"i have been using the implanon for almost 4 years. when i first got it, it was great! i hardly ever got my period. i would get one period every 8 months or so for about 4 weeks, which i can&#039;t complain. once i got it replaced last year after my 3 years expired, it all changed. i gained at least 15 lbs, i go to the gym regularly and it&#039;s nearly impossible for me to lose weight. i get my period every 4-5 weeks and it last 3 weeks every time. i&#039;m always moody, tired and have no sex drive. i enjoy this birth control only because it has prevented pregnancy, but i am starting to hate the side effects my body is experiencing."