"had this for 1 year &amp; 1 month to be exact. first 5 months were horrible. irregular periods &amp; i always felt like i was pregnant, but as months went past... my periods became regular again &amp; i always forget i have it in my arm. very effective, really does prevent pregnancy! my only concern is when it&#039;s time to come out, i&#039;ve seen too many videos where it was hard for it to come out."