"i had the implant in my arm for about 10 months. the only reason why i never got pregnant was because my period lasted for 4-6 weeks. which was the worst side effect. i was very moody and never realized it until people would tell me and i had to reflect and see myself acting out of the ordinary. before getting the implant, i was a nice 140 pounds and then i went to 165 in about 2 months. i&#039;m a professional dancer and i&#039;m in the gym 5 times a week and i eat extremely healthy. no matter what i did, i could never lose the weight. i took the implant out about 2 weeks ago. i went from 165 pounds to 157 in that 2 week time. my periods are back to 4 days also. i will never try this again and i&#039;m looking into different birth controls. stay away!"