"nexplanon is my first birth control. i have had it for about 5 months now. i had it inserted about 8 weeks after i had my first baby.  for the first week after it was inserted, i had a &quot;normal&quot; period and after that, it went away and i have not had another period at all (not even spotting!) i have not gained weight. i have not had any side effects. if you don&#039;t want periods, i think it works best if you are breastfeeding at the time you get it."