IUDs are 20 times more effective at stopping unintended pregnancies than the pill. Why do so few American women use them? 0 researchok HealthJune 2012Saturday, June 2, 2012 at 1:07 am PDT • Views: 879 psmag.com More IUDs American Women Birth Control Cheap Piece Dalkon Shield Near-zero Failure Rate Oral Contraception Pregnancy Unintended Pregnancies