"i choose implanon because i was advised it was low hormone, so the side effects would be minimal, plus it&#039;s entirely low maintenance, i could get it and forget all about it. however, in the first month alone i gained 20  pounds, that despite healthy eating and exercise would not disappear. no problems at first besides that. then about a year after i had it, my periods started lasting two weeks at a time, then it stopped for a couple months then i started getting them twice a month. my arm goes numb all the time as well.  i liked the concept of it, but the side effects are just ridiculous."