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Natural Cycles contraceptive app reportedly led to unwanted pregnancies

The Natural Cycles app, which has nearly 700,000 users worldwide, is designed to work by scanning women’s body temperature during their menstrual cycle to inform them when they can have unprotected sex. Those days show up in green on a calendar. On the days marked in red, couples are advised to use other contraceptive methods such as condoms. Last year, Natural Cycles released a study it funded stating that the app was more effective than the contraceptive pill. 

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