The chances of avoiding pregnancy when using an IUD are excellent. Only eight out of 1,000 women using copper IUDs will become pregnant during the first year of use. Only six out of 1,000 become pregnant with perfect use. Fewer than three women in 100 using an IUD with progestin will become pregnant during the first year of use. Fewer than two will become pregnant with perfect use.
Fewer pregnancies happen with continued use.
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