IUDs are Long Acting Reversible Contraception.(LARC). Depending on the choice of IUD, there is effective contraception for 3- 10 years with contraceptive failure rates of <1.0%. It's effectiveness, low failure rate and ease of use has made it a popular form of contraception.
However, its cost has been prohibitive for women without health insurance coverage -with an IUD costing approximately $750 and the cost of insertion averaging $250. Under the Affordable Care Act (ObamaCare), there is no out-of-pocket cost for the IUD and its insertion. (There are exemptions which is why a woman will need to have her coverage verified prior to acquisition.)
Free access to contraception may change with President-elect Trump administration.