Cycle Insights – Help Center

Cycle Insights allows members to better understand their full cycle by tracking the two main phases, follicular and luteal. Cycle Insights allows members to predict their period and also provides information about how the full cycle impacts the entire body. The feature is available for:

Gen3 and Oura Ring 4 with active membership
iOS
Android

This feature is not available on Gen2 or older.

How to Use Cycle Insights
What You'll See in Cycle Insights
Cycle Phases
Period Prediction
Fertile Window
Logging and Editing Periods
How to Remove Your Women's Health Data from the Oura App
How to Turn Off Cycle Insights
Troubleshooting
Things to Keep in Mind
More Information

How to Use Cycle Insights

Different hormone levels in each phase contribute to natural temperature fluctuations in the menstrual cycle. Cycle Insights uses these temperature deviations to accurately track, predict, and visualize your monthly cycle. Your Readiness Score also takes into account these natural biometric fluctuations during the menstrual cycle.

The feature is designed for individuals who have a menstrual cycle and a natural hormonal cycle.

It takes 60 nights of data to tailor predictions to your unique physiology. Until then, predictions for your period start and fertile window are based on information you provide about your last period and average cycle length. To get the most accurate predictions, be sure to log both your period start date and each day of your period.

To turn on Cycle Insights, tap on the menu in the upper-left corner of the Today tab and go to Settings > Women’s Health > toggle on Cycle Insights.

If you’re new to Cycle Insights, you’ll be guided through a short questionnaire that includes:

When your last period started
How long your cycle typically is
Whether you use hormonal contraceptives or other hormones

Once you enter the date of your last period, it can’t be edited later. However, Cycle Insights doesn’t rely solely on the calendar method to track your cycle. Once you’ve logged 60 nights of data, your insights will be based on your physiological patterns, not just the initial setup information.

If you’re currently using hormonal contraceptives or are pregnant, your body’s natural temperature patterns may be affected. As a result, Cycle Insights may not be able to accurately show your cycle phases or predict the timing of your period—even if you still menstruate. Hormonal contraceptives can impact your cyclical variations, cycle length, and bleeding patterns. You can still use Cycle Insights, but you’ll only see period predictions—not cycle phases, the Fertile Window, or related insights. You can update this anytime in Settings.

Once Cycle Insights is turned on, you can access it from the home card or the Cycle day shortcut at the top of the Today tab, or in the Vitals tab.

What You'll See in Cycle Insights

In the Cycle Insights detailed view, you'll find a deeper look at your temperature patterns, current cycle phase, cycle stats, chance of conception, and educational content related to your current phase. You’ll also find a shareable report summarizing the last six months of your data, including cycle length, period length, temperature variation, cycle phases, and symptom tags.

Cycle Phases

The menstrual cycle has two main phases, the follicular phase and the luteal phase. During the follicular phase, which is from the first day of menstruation to ovulation, rising estrogen levels may cause your average body temperature to decrease. During the luteal phase, from ovulation until the next menstruation, rising progesterone levels usually elevate your average body temperature.

Period Prediction

Oura uses your nightly average body temperature, along with other biosignals like HRV, to make your multi-day period prediction window. Your period prediction windows are created from comprehensive data that builds over time, not single intakes. Historically, most period tracking solutions rely on the calendar method, which uses your last period start date and a user-inputted cycle length to predict the start of your next cycle. However, periods can change from cycle to cycle and be impacted by various factors like stress, diet, and illness.

Cycle Stats

Your Cycle Stats show your typical cycle length, variability, and period length, based on the medians of the cycles you’ve logged over the past six months.

Cycle length is the number of days from the first day of your period to the day before your next one starts. A regular cycle is typically 21–35 days
Cycle variability measures how much your cycle length changes from month to month. A variation of ±3 days or less is considered regular
Period length is the number of days you experience menstrual bleeding. Periods lasting 2–7 days are considered regular

Many things can affect cycle variability. A single irregular cycle is usually nothing to worry about, but if you’re noticing consistent changes or have questions, consult with your doctor.

Fertile Window

Fertile Window will provide you with more information on your chances of getting pregnant throughout your cycle. When using Cycle Insights, you’ll see an estimate of your peak fertility, chance of conception, predicted ovulation day, and when ovulation has been detected.

Your Fertile Window is the time during your cycle when you're most likely to conceive. It includes the five days before ovulation, ovulation day, and the day after—seven days total. This estimate is based on your logged cycle info and physiological data, such as temperature trends, cardiovascular signals, and respiratory metrics.

Once you log your period start date, your estimated Fertile Window appears and remains visible until your luteal phase begins. After that, the app shifts to show your predicted period, if available. In the Calendar view, you can track your estimated Fertile Window, ovulation day, and upcoming period all in one place.

In some cases, people may have cycles without menstruating. If you don't have a period during a cycle, wait until the end of your luteal phase when your temperature drops, and log a period with "Skipped period." The ovulation and Fertile Window can’t be predicted if periods are not logged accurately.

Before Ovulation Is Detected

In the Predictions section, dashed white circles mark your estimated Fertile Window. One of these days will include a white egg icon—your estimated ovulation day
On days within your estimated Fertile Window, your Chance of Conception will be labeled “High.” Outside this window, it will show “Low
Your estimates may shift as more data becomes available. These insights are for tracking purposes only and should not be used as a form of birth control

As Ovulation Is Being Confirmed

Oura monitors your temperature patterns for at least two days before confirming ovulation. Since many factors can raise body temperature, this helps avoid false positives
During this time, the estimated ovulation day icon in your Predictions section will temporarily switch from an egg to a clock icon, indicating confirmation is in progress

After Ovulation Is Detected

In your Predictions section, your Fertile Window will be marked with solid white circles, and your confirmed ovulation day will appear with a solid white egg icon
On your Daily Temperature graph, confirmed Fertile Window days will be shown as dots beneath the temperature line
Your chance of conception will be marked as “Ovulation detected.”

Keep in mind, if you update a historical period log or if your temperature patterns shift significantly, your confirmed ovulation date may adjust.

If you think your temperature data didn’t clearly indicate ovulation, you can add a "Positive LH test" tag. This will update your ovulation date to the following day, and adjust your Fertile Window accordingly.

As Fertile Window is a regulated feature, it's available only in countries where the regulatory requirements have been met. See the Feature Availability list and the Fertile Window User Manual.

Logging and Editing Periods

To see cycle phases, make sure to confirm your period start date each month. You can log your period in few ways:

Go to the Cycle Insights detailed view through the home card or Cycle day shortcut on the Today tab, or through the Cycle Insights card in the Vitals tab. Then tap the Log button under the Cycle Day section
Tap the + button in the bottom-right corner of the Today tab and select Log period

When logging your period, you can also low flow level (light, medium, heavy, or skipped) at the start of your period. This helps improve the accuracy of your predictions.

If you change or retroactively log your period start date, your cycle phases will automatically update.

To delete or edit a period entry:

In the Cycle Insights detailed view, scroll back to your logged period and tap Edit to change the date or delete the entry

Using any tags (for example, "Positive LH test") will not indicate when new cycles begin and, therefore, not display cycle phases.

How to Remove Your Women's Health Data from the Oura App

Women's Health data may include information about your cycles, such as your latest period start date and cycle length, women's health-related tags (such as positive pregnancy test, ovulation, positive LH test, etc.), period prediction settings, reproductive hormone answers, pregnancy information, and fertile window. Your data is collected, used, and protected in compliance with Oura's Privacy Policy.

You can remove your data from the app at any time in the Settings menu under Women’s Health. Removing your data will disable all Women's Health features in the Oura App. If you would like to delete from Oura’s servers completely, you can choose Delete account and all data in the Settings menu or through Oura on the Web. See How Oura Protects Your Data.

Read about our commitment to reproductive health data privacy on The Pulse Blog.

How to Turn Off Cycle Insights

You can turn Cycle Insights on or off at any time. Tap the menu in the upper-left corner of the Today tab, then go to Settings > Women's Health.

Use the toggle to turn off Cycle Insights. This will pause period predictions and hide all cycle-related data until you turn the feature back on.

Using the "Positive Pregnancy Test" tag will also automatically turn off Cycle Insights.

Troubleshooting

If you're not seeing cycle phases, period predictions, or your Fertile Window, it could be due to:

Your ring hasn’t yet gathered 60 nights of data
You haven’t worn your ring consistently, especially during sleep
You haven’t synced the Oura App recently
You haven’t logged your periods
There’s a network error
There’s a lack of a clear physiological pattern

If there’s a lack of physiological pattern, it could be caused by:

Short-term factors, such as alcohol, illness, medication, jet lag, stress, or a one-off anovulatory cycle (a cycle when you don’t ovulate)
Long-term factors, such as using hormonal contraceptives, recently coming off hormones (within the last six months), pregnancy, persistent anovulatory cycles (you repeatedly do not ovulate every month), or coming off hormones more than six months ago without menstruating

If you consistently don’t see cycle phases or Fertile Window predictions after troubleshooting the above, it may be helpful to discuss your cycle history and temperature trends with your doctor. A one-off anovulatory cycle is perfectly normal, but a persistent lack of temperature pattern could point to an underlying issue.

Things to Keep in Mind

Cycle Insights is designed for individuals who menstruate and have a natural hormonal cycle. Some health factors, life stages, or medications can affect your temperature patterns and limit what the feature can show
- If you're in menopause or post-menopause, you may still see temperature trends, but without period logs, Cycle Insights won’t display predictions or cycle phases. You can still use tags to track symptoms related to perimenopause or menopause and better understand how your body is changing
- Cycle Insights can still be used by individuals who ovulate but don’t menstruate. If your temperature shows a consistent shift from above your baseline to below your baseline, this may signal the start of your follicular phase. You can log a skipped period when this shift occurs to help track your cycle phases
At this time, a logged pregnancy can’t be removed or deleted from your Cycle Insights history. To begin showing your cycle phases and Fertile Window again, the app will need to collect new temperature and biometric data — which may take up to 60 days. To help rebuild your cycle profile, wear your ring consistently during sleep and continue logging your periods
Only one period can be logged per calendar month, and data integrations from other period-tracking apps such as Apple Health or Clue are not currently available
Oura uses your nighttime temperature trends to help determine key events in your cycle. If you're also using another app, your predictions may not match exactly — each method relies on different data points and weighting. Oura measures your temperature once per minute throughout the night to capture a more complete picture. You can read more about our temperature accuracy here
Fertile Window is intended to help individuals who are trying to conceive by providing visibility into ovulation timing and chance of conception. This feature complements our partnership with Natural Cycles, an FDA-cleared Class II medical device in the US that offers both birth control and conception modes. We encourage our members to select the feature set that is right for them based on their goals and preferred user experience. See How to Use Natural Cycles with Oura for more information