"i am a graduate student who has never had children and got the mirena because iud&#039;s have the highest rate of success (especially over time) for birth control. the insertion was painful (pain scores 7-8) but i slept for a couple hours after the procedure and when i woke up the pain had subsided to a 2-3 (out of 10). i had very light spotting the first couple of weeks, but have not had a period since the insertion (i had the device placed early june 2015). i have noticed some moderate back acne and slight weight gain, but i am unsure whether those can be attributed to other life circumstances at this point. if the weight gain continues i will write another review, but at this point my experience has been great."