"At first I was in love with my implant birth control... it started with bleeding for a while and really randomly (for about six months), but not so much it was causing problems. I got it to regulate my periods (not for birth control as I am not sexually active) and with my first implant it completely ended my periods. After the three years was up, I was told that we were switching from implanon to nexplanon and thats when things started to go downhill. I&#039;ve had the nexplanon for about a year and a half and the weight gain is what is making me get rid of it. I thought at first it was simply the freshman 15 since I went to college, but after making serious diet and exercise changes after first semester I&#039;ve continued to steadily gain weight."