Natural Cycles partners with Oura Ring to monitor temperature for birth control app

Natural Cycles partners with Oura Ring to monitor temperature for birth control app

Ouramaker of a health-tracking ring, announced a partnership with birth control app Natural Cycles to use its wearable device to monitor changes in body temperature.

Users will be able to sync recorded temperature data from Oura Ring to the Natural Cycles app instead of taking their temperature manually each morning. Natural Cycles, which received FDA De Novo Approval in 2018, uses temperature data and menstrual cycle information to determine a user’s fertile window and prevent pregnancy.

The Swedish company also received a regulatory green light last year to use third-party thermometers as part of its fertility determination system. the stuffing specifically mentioned Oura’s Ring.

“We have been actively working to provide a seamless measurement experience for our users and were thrilled to receive FDA approval to use Oura Ring with our algorithm,” Natural Cycles co-founder and CEO Elina Berglund Scherwitzl said in a statement. . “We are proud to officially launch this partnership and work alongside a company that is equally committed to bringing advanced health tools to women at a time when it has never been more important. With the help of Oura data, Natural Cycles is fueling the future of birth control.”


Berglund Scherwitzl, a former particle physicist, founded Natural Cycles with her husband in 2013. The app received a European CE mark in 2017.

However, the company ran into some snags shortly after its European certification. In 2018, the UK Advertising Standards Authority found a Facebook ad describing Natural Cycles as a “high-precision contraceptive app” and a “clinically proven alternative to contraception” to be misleading after the agency received complaints. Natural Cycles said it removed the ad after it ran for about four weeks and respected the ASA’s decision.

It also faced an investigation by the Swedish Medical Products Agency after a Stockholm hospital found that 37 of 668 patients seeking an abortion during September and December 2017 had been using the app for birth control. The agency later determined the unintended pregnancy rate is in line with the reported effectiveness of the product.

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Meanwhile, Oura released the latest version of its wearable device, Oura Ring Generation 3, in October. Although the company did not release details, it raised an “oversubscribed” financing round earlier this year that raised its valuation to $2.55 billion. Oura had previously secured $100 million in Series C financing in May 2021.

Clue also offers a birth control app, which received FDA 510(k) clearance last year. Unlike the Natural Cycles app, it only uses period start dates to determine fertility.

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