Bacterial vaginosis (BV) seems to be more common in women who use intrauterine device (IUD) for birth control than in non-IUD users. In fact, one study shows that almost half of IUD users have BV. So the question is: Is there any evidence that would say IUD is causing bacterial vaginosis?
A recent review on several studies found fault to previous findings that say there is significant relation between BV and IUD. The review pointed out that previous findings are insufficient and lack of merits to support their claim.
One weakness of the previous studies are that it doesn't have control data on the status of vaginal microflora before IUD insertion. Without these data, one cannot draw conclusive findings about the possible role of IUD insertion to the development of BV.
While it was observed that Pelvic Inflammatory Disease (PID) is greater in the first month after IUD insertion, this is just interpreted as a case of insertion-associated inflammatory. To minimize this risk, it is highly recommended to adopt the universal standard clinical procedure in inserting and replacing IUD.
The contribution of IUD used to trigger vaginal flora changes that will lead to the development of bacterial vaginitis remained a controversial issue. Proof of higher prevalence between using IUD and BV cases is at all not sufficient. As of this writing, there is yet no concrete evidence which will firmly establish that using IUD can cause BV.
If you are using IUD and experience frequent bacterial vaginal infection, it may be best for you to remove your IUD and try other birth control contraceptives. Just see what will happen.