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the claim

The Creighton Method of Natural Family Planning has a failure rate of 3.2 percent or less

the verdict

SUPPORTED

the evidence backs this

confidence 75/100

Evidence indicates that the Creighton Method of Natural Family Planning has a perfect-use failure rate around 0.5% and a use-effectiveness failure rate generally at or below 3.2 percent.

Evidence for · 3

skeptics.stackexchange.com: Does the Creighton Method of Natural Family Planning ...

cited by 0

Notes claims of a 3.2% typical-use and 0.5% perfect-use failure rate for the Creighton Method.

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More for · 2

pubmed.ncbi.nlm.nih.gov: Use effectiveness of the Creighton model ovulation method ...

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Shows a 12-month use effectiveness of 98.0% (a 2.0% failure rate) and method effectiveness of 98.8%.

en.wikipedia.org: Creighton Model FertilityCare System

cited by 0

States a perfect-use failure rate of 0.5% for the Creighton Model.

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first checked31 Jul 2026

judged → SUPPORTED · 7531 Jul 2026

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