"i&#039;m 17 years old. i had the nexplanon inserted 1 year ago.  i was getting the depo shots for 2 years before i got the implant because i had very heavy and long periods. i got sick of going in every month for a shot so i figured getting the implant that lasts 3 years would be perfect and i wouldn&#039;t have to worry about getting pregnant. i haven&#039;t had a period since i got the implant, no spotting or any bleeding at all. i didn&#039;t gain any weight from it. its not common for people to gain weight from it. but if you do eat healthy and exercise and you should be fine."