Natural Cycles, an all-natural, FDA-cleared contraception, is powered by Oura for a hassle-free solution that evolves with you.
Powered by Smart Sensing, Oura Ring 4 uses an advanced algorithm and sensors to ensure precise, continuous data 24/7. Now available in sizes 4-15.
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Natural Cycles° is a temperature-based contraception app that helps you prevent pregnancy*.
100% natural birth control
Free from hormones and side effects
World’s first birth control app powered by a wearable
Daily fertility insights
Plan or prevent pregnancy naturally
Powered by your Oura temperature trends
Oura automatically syncs with NC° every morning
Sign up for Natural Cycles°
Click below to redeem
your 28-day free Natural Cycles° trial.
Pair your Oura Ring
Go to the top left corner of the NC° app to start: My Device > Switch Device > Oura Ring.
Start tracking
Wear your Oura Ring to bed and check NC° in the morning for your fertility status.
Privacy StatementWe understand that data does not get much more personal than this, and the protection of your personal data is of paramount importance to us. Oura uses technical and organizational safeguards to keep your data safe and secure. Where appropriate, these safeguards include measures such as anonymization or pseudonymization of personal data, strict access control, and the use of encryption to protect the data we process.
*Natural Cycles is available as a method of birth control in the US and territories; United Kingdom; Ireland, France; Germany; Netherlands; Luxembourg; Belgium; Spain; Portugal; Austria; Switzerland; Italy; Latvia; Lithuania; Malta; Estonia; Sweden; Denmark; Norway; Finland; Iceland; Bulgaria; Czech Republic; Hungary; Poland; Romania; Slovakia; Greece; Cyprus; Croatia; Slovenia; Montenegro; Singapore; Australia. Outside these countries listed, Natural Cycles is intended to be used for fertility monitoring. You must be over the age of 18 to use Natural Cycles. Natural Cycles does not protect against STIs.