"yes, this medication is effective if you want to practice abstinence.  i have had this implant since august of 2014, i bled for the first 4 months. i took a po birth estradiol for 2 months to stop the bleeding. it helped for the 2 months and then i began bleeding again. i feel exhaused all the time and feel bloated most of the time.  i was a runner and healthy eater before, have kept it up for the last year (mostly by forcing myself to get up and go when i used to run for enjoyment).  since i started with the nexplanon have gained 15  lbs. i do not recommend this implant.  i am scheduled to get it taken out this week."