Mirena
"I am a graduate student who has never had children and got the mirena because IUD'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."