Birth control with no side effects

We’ve partnered with Oura so you can measure by wearing your ring to bed. If you already have an Oura Ring, you can sync it through the Natural Cycles app in the “My Device” page. If you don’t have a ring, purchase your Natural Cycles subscription, download the NC° app, and visit the “Buy extra supplies” page to claim your exclusive discount.

Natural Cycles is a regulated medical device that follows GDPR and we also have our own very heavy data security measures in place that include encryption. Protecting user’s information has always been a top priority for Natural Cycles and as sensitive data becomes more sensitive, we’ll continue to make sure your data is safe with us

During your menstrual cycle your temperature rises after ovulation and then falls slightly when your next period comes, this is due to a change in your body’s hormone levels. The Natural Cycles algorithm analyzes your temperature and period data to find ovulation.

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Yes. The effectiveness of Natural Cycles is supported by clinical evidence, which shows a typical use effectiveness rate of 93% and a perfect use effectiveness of 98%.

Learn more about our effectiveness

Absolutely. Natural Cycles goes beyond birth control, learning about your cycle also gives you the power of knowing when it’s the best time to conceive.

Check out NC° Plan Pregnancy

We are CE Marked in Europe and FDA cleared in the US as a medical device for contraceptive use. We are also now listed on the Australian Register of Therapetic Goods.

Discover the research behind the app

If you’re breastfeeding, we recommend you start measuring as soon as you get your period back. How soon it returns depends on a number of factors, including whether you are breastfeeding part-time or full-time.