"i got my mirena inserted at the end of december 2013 and it is now february 2014. i have a three month old. the insertion wasn&#039;t painful, but it was uncomfortable for a few minutes. after i experienced light cramping for about a day. i&#039;ve been bleeding since i got it but it&#039;s not heavy. i am a teenager so if you are a teen mom i recommend this. you don&#039;t have to remember to take anything. i haven&#039;t gained any weight and have had no serious side effects. so far it&#039;s great."