Body temperature has been a component of Natural Cycles’ calculations since the app hit the market. Specifically, the startup developed an algorithm that uses a women’s basal body temperature and other menstrual data to calculate fertility status.
Previously users were required to manually take their temperature and add it to the app. However, thanks to this FDA revision, Natural Cycles can use its new software to integrate wearable data including a user’s temperature and heart rate into the fertility algorithm.
The Swedish company announced that it submitted an FDA premarket notification for third-party thermometer integration back in October.Source: MobiHealthNews