When Smartphone and iPhones are used for contraception. A comparison study of 7 symptothermal Apps
ESC Congress Library. Wettstein H. 05/28/14; 50601; A-186
Dr. Harri Wettstein
Dr. Harri Wettstein
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Abstract
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1. The goal was to find out whether there are any apps on AppStore and Google Play that are able to indicate the fertile window as precisely as the best symptothermal method. This study was operated in summer 2013 and has not been published yet.


2. This study compares the 7 symptothermal applications that can currently be found on the AppStore and Google Play among more than 50 fertility apps which have been excluded right from the beginning as they are not adapted at all for contraception and highly misleading for this purpose. The evaluation criteria were severely examined; those who have been eliminated can be found in the annex of the overall study. Only quantifiable criteria were retained, such as the identification of false negatives and false positives days compared to an ideal solution (in which there is 0 false negative, 0 false positive day per cycle). A false negative day is a day that is wrongly indicated as infertile: it drastically increases the risk for unwanted pregnancy. A false positive day is a day that is indicated as fertile but it is not: too many false positive days are not interesting for the couple as it should use the condom or stay with abstinence during too many days of the cycles. The study focuses on the passage from the fertile window into the post-ovulatory infertile phase; it submits four typical cycles and then 4 more complicated ones to the 7 selected symptothermal applications.


3. The best results were found on sympto (AppStore and Google Play), followed by Lily (AppStore) and MyNFP (AppStore), which are far ahead compared to other symptothermal applications that have not yet reached a sufficient level in order to be used for contraception.


4. The entrance into the fertile window has not been systematically examined, as this kind of study needs examples of at least 13 continuously observed cycles per woman. This complementary research is scheduled for summer 2014. The main conclusion is that the best symptothermal methods are found among these three applications which enable a natural contraception to be as effective as any hormonal contraception.

1. The goal was to find out whether there are any apps on AppStore and Google Play that are able to indicate the fertile window as precisely as the best symptothermal method. This study was operated in summer 2013 and has not been published yet.


2. This study compares the 7 symptothermal applications that can currently be found on the AppStore and Google Play among more than 50 fertility apps which have been excluded right from the beginning as they are not adapted at all for contraception and highly misleading for this purpose. The evaluation criteria were severely examined; those who have been eliminated can be found in the annex of the overall study. Only quantifiable criteria were retained, such as the identification of false negatives and false positives days compared to an ideal solution (in which there is 0 false negative, 0 false positive day per cycle). A false negative day is a day that is wrongly indicated as infertile: it drastically increases the risk for unwanted pregnancy. A false positive day is a day that is indicated as fertile but it is not: too many false positive days are not interesting for the couple as it should use the condom or stay with abstinence during too many days of the cycles. The study focuses on the passage from the fertile window into the post-ovulatory infertile phase; it submits four typical cycles and then 4 more complicated ones to the 7 selected symptothermal applications.


3. The best results were found on sympto (AppStore and Google Play), followed by Lily (AppStore) and MyNFP (AppStore), which are far ahead compared to other symptothermal applications that have not yet reached a sufficient level in order to be used for contraception.


4. The entrance into the fertile window has not been systematically examined, as this kind of study needs examples of at least 13 continuously observed cycles per woman. This complementary research is scheduled for summer 2014. The main conclusion is that the best symptothermal methods are found among these three applications which enable a natural contraception to be as effective as any hormonal contraception.

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