the infection risk was with earlier forms of IUDs, that issue is largely fixed.When I had an IUD (granted, decades ago), the warnings to their use still included possible pregnancy, heavier period, infection and the risk that the IUD could possibly move/relocate in uterus or actually come out.
compared to the health risks of pregnancy it's like comparing the risks of the covid vaccine to the risk of getting covid without a vaccine IMO. In other words the vaccine may have rare risks, but it's really no comparison.Granted, like pretty much all methods of birth control, the percentages of such things happening were small, but still possible. Just an fyi from my experience.