"i have had the implanon for the last two years, i&#039;m supposed to get it out august of 2015. i did not gain weight, actually it helped me lose it. ever since i got it inserted in my arm i have not had a period, so no period for the last two years. recently my friend was kind of pushy and grabbed my arm too tight and it knocked my implanon out of place so now i am starting my second period in the last three weeks. this is an amazing birth control but be careful when it comes to people grabbing on your arm."