Pearl Index Diagramm. It is moderately effective with a one year failure rate of around 12 with typical use. Twirla pearl index 1.
The diaphragm is a barrier method of birth control. How is the efficacy of a contraceptive measured. Addition 6 i designed this to go with pearls.
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Efficacy of a contraceptive method is measured by two methods. Pearl index is used for measuring the failure rate of a contraceptive. Upper bound of 95 confidence interval. The pearl index is sometimes used as a statistical estimation of the number of unintended pregnancies in 100 woman years of exposure e g.
