Scherwitzl EB, et al. - This study is performed to investigate the contraceptive efficacy of the mobile application by evaluating the perfect- and typical-use Pearl Index. This study demonstrates that the effectiveness of a contraceptive mobile application is higher than usually reported for traditional fertility awareness-based methods. The application may contribute to decreasing the unmet requirement for contraception.

Methods

• For this research, they designed a prospective observational study.
• This study 22,785 users of the application logged a total of 18,548 woman-years of data into the application.
• They utilized this information to figure typical- and perfect-use Pearl Indexes, and in addition to 13-cycle pregnancy rates utilizing life-table examination.

Results

• In this study, they found a typical-use Pearl Index of 6.9 pregnancies per 100 woman-years (95% CI: 6.5-7.2), corrected to 6.8 (95% CI: 6.4-7.2) when truncating users after 12 months.
• They assessed a 13-cycle typical-use failure rate of 8.3% (95% CI: 7.8-8.9).
• They found that the perfect-use Pearl Index was 1.0 pregnancies per 100 woman-years (95% CI: 0.5-1.5).
• At last they evaluated that the rate of pregnancies from cycles where the application erroneously flagged a fertile day as infertile was 0.5 (95% CI: 0.4-0.7) per 100 woman-years.
• They assessed a discontinuation rate more than 12 months of 54%.