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Cycle-tracking app officially approved as contraceptive in Europe

Cycle-tracking app officially approved as contraceptive in Europe. Science & Technology World Website


Natural Cycles has become the first fertility app to be approved as a contraceptive in Europe. Its CE marking of class IIb signifies that it has met safety, health and efficacy requirements in the same risk category as a condom.

The app is based on natural family planning methods that existed long before smartphone apps ever did, but Natural Cycles modernizes those tracking methods by combining readings from a basal thermometer with a proprietary algorithm that accounts for cycle irregularities and sperm survival rates. It presents information in a mobile interface that denotes which days the user is not fertile and which days she should use protection.


Cycle-tracking app officially approved as contraceptive in Europe. Science & Technology World Website


One study of 317 women showed that the Natural Cycles algorithm was able to identify ovulation with near-ultrasound level accuracy. Another study, which was performed on over 4,000 women, showed that an average of seven women out of 100 became pregnant in a year when using Natural Cycles as a birth control method. Both studies were published in The European Journal of Contraception & Reproductive Health Care.

This is equivalent to a typical use Pearl Index (a measurement used in clinical settings to denote birth control efficacy) of 7.0. For reference's sake, traditional natural family planning is usually considered to have a typical use Pearl Index of 25. Typical use Pearl Index for the pill is usually reported around 9.

Natural Cycles is available on iOS and Android. It is a subscription-based service which starts at US$9.90 per month, or $5.80 per month for a yearly plan with a thermometer included.

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