"i had mirena for 4ish years.  i had no pregnancies and almost no periods, which is exactly what i wanted.  

i did have to make an ob appointment and have a quick ultrasound to check it once.  i felt it move somehow during sex and then had a bit of bleeding.  ob confirmed that it was just a scratch and not a uterine puncture or anything major.  the other downside for me was sexual side effects, most notably &quot;diminished arousal response&quot;

even with those two negatives, i would get mirena again if i were in a position where preventing pregnancy was essential."