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If there were no pregnancies reported in the Essure clinical trials, then can Essure be considered 100% effective?

April 26, 2017clinical trials effective Essure pregnancies reported

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If there were no pregnancies reported in the Essure clinical trials, then can Essure be considered 100% effective?

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No. No method of contraception is 100% effective. Based on clinical trials of over 600 women, Essure has been demonstrated to be 99.80% effective at four-years of follow-up. The effectiveness rate is stated as 99.80% instead of 100%, since the statistical calculation of the effectiveness rate was based on a sample size in the trials of over 600 women.