"i have had this for a year now and i can say it is a very effective birth control. mine is in my arm at an angle though which scared me. one end was poking out and the other was so down in my arm i could barely feel it. my doctor said it was fine and over time it has levelled out for the most part. no bleeding for the first 6 months! after that the periods were light at first but are getting heavier. the first period after that 6 months was for a month straight. then they were like 4-7 days once a month which is normal for me. currently on day 22 of a period. it feels like i am peeing my pants because the blood comes in waves and my uterus lining come off in huge chunks. most part great birth control with disgusting periods."