"i have had mirena in for 1 year and 9 months. i have a positive experience so far. i got it put in place 2 months after having my son. when i first got it in, it did not really hurt. i kind of feel that i have had weight gain from it (after having my son, i lost 20-25 lbs right off the bat). i gained all the weight back, i had lost and plus 10 lbs more, despite exercising a lot and eating right. i&#039;ve also had a little discomfort with sex (only recently) i have also notice that when i should be bleeding, i only get cramping.  i only had about 2 months of regular periods. i really find this method of birth control great, except for the few side effects. i plan on getting the mirena out in october, to see if the side effects go away."