"i got my nexplanon implant inserted february 29th 2016. it is now july 31st 2016. i have been spotting this entire time, and i still get my very heavy monthly. i have maybe gotten a 1 week break total over the months i&#039;ve had this in. i can definitely say that nexplanon is indeed effective... since it seems to be eliminating the chances of getting pregnant at the source, not being able to have sex. i already have mood disorders that this birth control makes 100x worse. i tend to find myself crying &amp; getting irritated over absolutely nothing. it has also effected my appitite, i eat wayy less than i used to, and in smaller amounts (which is not good for someone who is already weighing in at 93lbs due to a thyroid issue)...it&#039;s coming out asap"