"i got the nexplanon bar in february. the insertion of the devise didn&#039;t hurt at all. my arm was just kind of sore the next day like someone pinched my arm fat. the bad thing was i had my period for 3 months, sometimes super heavy and sometimes barely there. after that time i haven&#039;t had a period since and i&#039;m clearly not pregnant so i&#039;d say it works pretty damn good as long as you&#039;re patient."