For those of you looking for info:
Getting any vaginal infection while using an IUD can increase the risk of developing a serious pelvic infection. This can result in a loss of fertility. For this reason, women need to assess their own risk for infection. If you have multiple partners or if your partner has multiple partners, your chance of infection is much higher.
Piercing or perforation of the uterine wall may occur during insertion of the IUD. Over time, an IUD may become imbedded in the uterine wall. An Imbedded IUD is still effective, but it can be painful and may need to be removed. There is a risk of surgery and/or sterility if an IUD becomes imbedded.
If a woman becomes pregnant while using an IUD, it is highly recommended that she have the IUD removed, whether or not she wants to carry the pregnancy to term. An IUD increases the risk of having a miscarriage or premature birth.
A woman who becomes pregnant while using an IUD is also more likely to have an ectopic pregnancy. An ectopic pregnancy occurs when a fertilized egg attaches and grows outside the uterus. This can be very dangerous and requires emergency medical attention.http://www.birth-control-comparison.info/iudinfo.htm