"i got the implant august of 2015 right before college and i bled for at least 4 months straight on and off, but mostly on. it&#039;s now february 2017 and i have gained 30 pounds!!!  yes i will say that it is effective but i would only recommend it if you don&#039;t plan to have sex. for a while, right after i had sex i would get my period and it would be super heavy which was nothing i ever experienced. i will say because of reading other reviews that their may actually be some truth about the depression thing. but i plan to get it out next month so that i can go back to my old size. but other than that no period, i just get them randomly."