I had Mirena put in this past February..I've given birth to 4 children and DO NOT want anymore..Upon consulting my physician I was under the impression that there were RARELY side effects..So I had the MIRENA put in this past February..For the first three months i bled EVERYDAY..I almost had it removed but then bleeding stopped to only spotting a couple days out the month(which I assumed would be my period) For the past couple months i've had a pain in my left lower abdomen and finally went to the doctor..I had an ultrasound and found out I now have ovarian cysts..I thought i'd look on the internet and found that there is a link between ovarian cysts and MIRENA..Also, since I had it put in, i've had at least 10 MAJOR yeast infections(which included a very bad odor & the worst itching) I have NEVER had problems like this before!!!! I've also experienced pains in my knee, thighs and back..I don't know if those are related to the MIRENA, but I NEVER had all these issues before.. I will be discussing other methods of b.c with my doctor AND getting this thing removed ASAP!!!!