"i just had my second nexplanon inserted in august 2016. overall it&#039;s been great. when i got the first one done i only got my period about every 3 months, but it became more regular in the third year. now with the second one inserted, my period hasn&#039;t shown up yet and probably won&#039;t for a few months. the only negative side effects i have experienced are some minor weight gain (although i have experienced weight gain on every birth control i&#039;ve tried) and considerable breast pain a few days before i start my period."