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The Pearl Index has unique shortcomings, however.

08 for obese and 1.

of patient observed X months of use B No.

2 Division of Biostatistics 3, Office of Biostatistics, OTS, CDER, FDA, Silver Spring, MD, USA.

That is an incorrect assumption for two reasons: first, the most fertile couples will get pregnant first.

Finally, we estimated that the rate of pregnancies from cycles where the application erroneously flagged a fertile day as infertile was 0.

Trials selected were reviewed by the US Food and Drug Administration FDA between 2000 and 2012, conducted in North America, had more than six 28-day cycle equivalents of exposure, and had readily retrievable participant-level data.

A: Accidental Pregnancies Methods of contraception are compared by the Pearl index.

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The superiority of life table methods or other estimators that do not assume a constant hazard rate seems clear.

Pearl index indicates the effectiveness of a contraceptive or is an index of contraception failure.