Birth control built around you

An FDA Cleared, non-hormonal, non-invasive way to take control of your fertility.

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Designed to keep your data safe
4.8Star IconApp Store

57.7K+ Global Ratings

Is Natural Cycles° right for you?

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What can we help you with?

Prevent pregnancyPrevent now, plan laterGet pregnant fasterTrack my pregnancyRecover from childbirthHaven't decided yet

How it works

Choose a device

Use our free thermometer when you sign up. Or sync our app with your Apple Watch or Oura Ring.

Take your temperature

Use your chosen device to take your temperature right when you wake up.

Open the Natural Cycles app

The app shows you your fertility status, cycle trends, and helpful insights.

How effective are other forms of birth control?

NON-HORMONAL

Natural Cycles°

Natural Cycles App

93%

Copper IUD

Copper IUD

99%

Condom

Condom

87%

HORMONAL

Hormonal IUD

Hormonal IUD

99%

Vaginal Ring

Vaginal Ring

93%

Contraceptive Pill

Contraceptive pills

93%

Reference: Contraceptive Technology (Table 26 - 1). 21st Edition, 2018

Get started
Natural Cycles

Backed by science, the Natural Cycles° algorithm is powered by your body temperature.

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Inside the app

Unlock

Our FDA Cleared algorithm uses your temperature to identify fertile and non-fertile days.

Track

Log mood, energy, and more to see how your cycle impacts you.

Learn

Customized insights and expert content to help you understand your unique experience.

Hear directly from Cyclers like you

4.8

57.7K+ ratings in the App Store

Michelle

I feel empowered knowing about my body’s natural processes.

NC° Birth Control

Bethany

I’ve experienced significantly less pelvic pain... and our intimacy couldn’t be better.

NC° Birth Control

Dr. Katara

Has got to be THE best natural birth control on the market. 10/10 recommend!

NC° Birth Control

Shadow

NC° helped me understand my body, cycle, and the best time of the month to get pregnant.

NC° Plan Pregnancy

Katie

Nothing short of amazing! We just welcomed our baby girl thanks to NC° 🥰

NC° Plan Pregnancy
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Join Our Community

#NaturalCycles

Summertime is just about here !! 🏊🤿⁠ ⁠ Worried about leaving a bloody trail in the water behind you? 🩸 The good news is that the water pressure in both the swimming pool and the sea often temporarily stops your menstrual flow while you swim 🛑⁠ ⁠ Your period doesn’t stop while you’re swimming, but the water pressure can stop menstrual blood from flowing out as you swim. If there are any changes in abdominal pressure – such as if you sneeze, laugh or cough – then some blood may be pushed out 👋⁠ ⁠ However, there’s no need to worry if you’re swimming in a pool as the volume of water is so large, so if a small amount of period blood does escape into the water, it’ll be diluted and unlikely to be seen by other swimmers 💧 Follow the link in our bio to learn more 🔗In the animal kingdom, reproduction is often closely linked to the seasons 🗓️ Many animals time their mating so that they give birth in the spring or summer months when the weather is better and there’s more food available 🌤️ This makes a lot of sense as timing reproduction when the weather is best means offspring have the best chance of survival.⁠ ⁠ Because we human beings are able to control our own habitat, we’re not as affected by seasonal changes. In addition, we also have access to birth control which gives us further power over our reproduction. ⁠ ⁠ However, previous research has indicated that human reproduction might still be affected by seasonal changes, with conception rates being higher in the spring and summer 🌻 Follow the link in our bio to learn more 🔗⁠ ⁠ Shanmugam, Divya, et al. “A Multi-Site Study of the Relationship between Photoperiod and Ovulation Rate Using Natural Cycles Data.” Scientific Reports, vol. 13, no. 1, 24 May 2023, www.ncbi.nlm.nih.gov/pmc/articles/PMC10209102/, https://doi.org/10.1038/s41598-023-34940-z. Accessed 13 Oct. 2023.⁠What'd we miss? 🤸 What excites you the most since making the switch? 📲A good understanding of menstrual cycles is crucial when it comes to getting to grips with the fertile window 👀 Your cycle starts on the first day of your period and ends when you start your next period 🩸 ⁠ ⁠ Although the textbook average menstrual cycle was always thought to be 28 days long, our research looked at 600,000 cycles and found that was only the case for 13% ‼️ A 29-day cycle was more common, but in reality, cycle length varies from person to person, and anything between 21 and 35 days is within the regular range 🗓️⁠ ⁠ The female fertile window is around six days long. It begins up to five days before you ovulate, and includes the day of ovulation. Then, once an egg cell is released, it is viable for a maximum of 24 hours before it deteriorates ⏳ ⁠ ⁠ That means you could potentially get pregnant at any time during your fertile window, thanks to the rate of sperm survival, as sperm can live in the female reproductive system for up to five days before an egg cell is even released! 🏊 Follow the link in our bio to learn more 🔗 “What Is the Fertile Window?” Natural Cycles, 11 Mar. 2020, www.naturalcycles.com/cyclematters/what-is-the-fertile-window?utm_campaign=feed&utm_medium=referral&utm_source=later-linkinbio. Accessed 21 Nov. 2024.
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Common questions

You must be over the age of 18.Does not protect against STIs.

FDA Cleared

Natural Cycles is 93% effective with typical use, 98% effective with perfect use. No method of contraception is 100% effective. Natural Cycles does not guarantee that you cannot get pregnant, it only informs you whether and when you can become pregnant based on the information that you enter into the application.