IUDs, Implants Best for Long-Term Birth Control, Washington University School of Medicine Study

Published: May 24, 2012

A study to evaluate birth control methods has found dramatic differences in their effectiveness. Women who used birth control pills, the patch or vaginal ring were 20 times more likely to have an unintended pregnancy than those who used longer-acting forms such as an intrauterine device (IUD) or implant.

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