The Oura Ring Generation 3 smart ring | Photo by Victoria Song / The Verge

The Oura smart ring is now compatible with Natural Cycles digital birth control, the companies announced today. The partnership lets Natural Cycles users pull in temperature information from their Oura Ring rather than manually take a temperature for the app each morning.

Natural Cycles uses daily temperature measurements and period cycle tracking information to predict the days of the month when someone is least likely to get pregnant. That daily temperature data originally came from a thermometer measurement done each morning. Last July, the company received clearance from the Food and Drug Administration to use temperature data from wearables like the Oura.

A few months after Natural Cycles received FDA clearance, Oura Ring a…

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