Reproductive Health

The Oura Ring offers a growing suite of reproductive health features, including Period Prediction Beta and an integration with the Natural Cycles app.

Period Prediction Beta
What is Period Prediction Beta?
What’s Unique About Oura’s Approach?
How Period Prediction Beta Works
How to Use Period Prediction Beta
Getting the Most Out of Period Prediction Beta
Things to Keep in Mind
How to Leave Period Prediction Beta

Natural Cycles App Integration

Period Prediction Beta

**Note: An update to Period Prediction will start rolling out to Android members on September 21, 2022. Members will be able to view their Period Prediction information directly on the Home tab within the Oura App, including your body temperature graph, current cycle day, latest body temperature difference, estimated next period start, and a dynamic calendar button.**

What is Period Prediction Beta?

Period Prediction Beta is the first feature from Oura designed for women and all people with a menstrual cycle. Period Prediction Beta uses key biosignals to provide a three-day prediction window for the start of your next cycle and period onset. In addition to upcoming monthly predictions, you’ll see historical data in the Oura App’s calendar view, helping you self-educate on your individual cycle and rhythms over the course of time.

Oura listens in to your nightly body temperature and uses this information along with other bio signals like HRV to make a prediction.

Period Prediction Beta is only available on the Oura Ring Gen3.

What’s Unique About Oura’s Approach?

Because there are unique changes that occur in body temperature across the menstrual cycle, body temperature is the key biosignal used to accurately track, predict, and visualize your monthly cycle. During the menstrual cycle, body temperature tends to decrease during the first half (i.e., follicular phase). Ovulation, which typically takes place during the midpoint of your cycle and marks the transition from follicular to luteal, causes body temperature to sharply increase. Body temperature will usually remain elevated throughout the second half of the cycle (i.e., luteal phase). During menstruation, or your period, body temperature will decrease because of an estrogen surge that takes place.

Oura uses your nightly body temperature, along with other biosignals like HRV, to make your 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.

During your first 60 days of using Period Prediction Beta, Oura will base your predictions off of the calendar method and the information you provided during onboarding. After 60 days, your predictions will be based on body temperature, as long as you have enough nights of temperature data, which means your prediction windows can update as your body changes over time.

How Period Prediction Beta Works

Period Prediction Beta works for individuals with natural temperature fluctuations in their cycle. Oura predicts your period start date by tracking patterns in your natural body temperature variation over the course of your cycle. Keep in mind, you’ll need at least two months’ worth of consistent temperature data recorded in the Oura App for personal body temperature to be used in predictions. If you’re still in the process of accumulating your 60-day temperature baseline, or if your natural variation can't be detected due to contraceptive use or other hormonal changes, predictions will be based on your last period, cycle length, and regularity.

Period Prediction Beta does not recognize pregnancy. If you get pregnant, we recommend leaving the Beta.

How to Use Period Prediction Beta

1. During the onboarding process to your Oura Ring Gen3, you’ll see an intro card in your Home Icon_Home.png tab. Tap anywhere on the card, or select "Learn more" to get started.


2. If you choose not to use Period Prediction immediately, you can get started later via Settings Icon_Settings.png. Tap the menu Icon_Bars.png in the upper-left hand corner of your Home Icon_Home.png tab > select Settings Icon_Settings.png > Period prediction > Join Beta. You can also read more about the Beta program and a few privacy details.



1. Once you join, you’ll be guided through our two-step onboarding flow, followed by a short background questionnaire.

2. All three questions are mandatory. However, your regularity and cycle length can be edited later via Settings Icon_Settings.png. We’ll ask you to share the following:

  • When did your last period start? Give us your best estimate if you can’t recall. 
  • How regular is your menstrual cycle? For reference, your menstrual cycle begins on the first day of your period and lasts until the day you start your next period, typically 21-35 days.
  • On average, how long is your usual cycle? For reference, Oura counts cycle length from the first day of your period to the day before your next period starts.

Once you’ve completed all three questions, tap "Done."

Receive your monthly predictions

1. Your Period Prediction will appear as a three-day window on your Oura calendar Icon_Calendar.png. To access your Oura calendar, go to your Home Icon_Home.png tab and select "Today" in light blue, located directly at the top of the screen.


2. You can scroll up and down through your calendar to see previous and upcoming months.

3. Your three-day prediction window for the upcoming month will be indicated with dotted outlines, while your confirmed start date from the previous month will be indicated with a solid fill. Icon_Tip__2_.png Please note that at this time, Oura is able to provide cycle prediction for one month in advance via the calendar Icon_Calendar.png view, though we hope to expand this range in the future. 


4. You’ll receive the following notifications on your Home Icon_Home.png tab throughout a full cycle to inform you of your upcoming start date and help Oura improve your future predictions. All notifications will appear in the morning in Home Icon_Home.png, after first opening your app.

Six-day notice before your window begins:


One-day notice before your window begins:


An ask to confirm the start of your period. This will appear on all three days of your window, up until you submit your final confirmation.


5. You can also log your period start date using the + button in the lower right-hand corner of your Home Icon_Home.png tab. This is helpful in case your period begins outside of the predicted three-day window. Though we can’t always plan for our body’s spontaneity, keeping track of these irregularities helps Oura get to know you and your cycle tendencies better, allowing your future predictions to improve. 


6. After either (1) confirming your Period Prediction notification or (2) manually logging your period using the + button, a card labeled "Log period start" will appear next. Here, you can log your flow level on the day your period starts. Tap "Done" in the upper right-hand corner once you’ve finished. Currently, you can only log flow level for the day your period begins.  

7. Once your period start is logged, you can view and edit it in Home Icon_Home.png. It’ll appear under "Activities" as "Period start." Tap anywhere on the card, or select the → to edit. Please note: the "Period start" tag, automatically added as a result of confirming or manually logging your period, is not the same as the "Period" tag. The "Period" tag, which can be found and added from the Tags list, cannot be used interchangeably with the automatically triggered, "Period start" tag.

Getting the Most Out of Period Prediction

  • Wear your ring on a consistent, 24/7 basis to help build a robust temperature data profile.
  • Confirm the start date of your period each month. If you haven’t yet accumulated at least two months’ worth of temperature data in your Oura App, you must confirm your period start date for each cycle to continue receiving predictions.
  • As you continue to accumulate more temperature data by wearing your Oura Ring 24/7, and confirming or logging the exact start date of your period each month, your predictions will become more accurate. With your routine monthly confirmations, Period Predictions made by Oura are estimated to be more than 85% accurate. Over time, this value will only continue to increase.

Things to Keep in Mind

  • If you’re currently taking a hormonal contraceptive, because your body’s natural temperature variation is impacted as a result, Period Prediction Beta may not be able to accurately assess the timing of your period (if you still menstruate under these circumstances). This is because regardless of the hormonal contraceptive being used, your cyclical variations, overall cycle length, and bleeding tendencies are all likely to deviate from your body’s natural patterns under these circumstances. 
  • Medical factors such as infertility and fertility treatments, endometriosis, pregnancy, breastfeeding, overtraining, weight loss, stress, etc. can also have an impact on the key biosignals used to predict your period by Oura. If one, or any, of these apply to you, please know this may impact Oura’s ability to accurately and consistently predict your period each month.
  • 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.
  • The length of your menstrual flow (i.e., number of bleeding days during your cycle) cannot currently be tracked by this feature. However, we hope to add this type of expansion in our next stages of development.

How to Leave Period Prediction Beta

You can choose to leave our Period Prediction Beta at any point in time via Settings Icon_Settings.png. Tap the menu Icon_Bars.png in the upper-left hand corner of your Home Icon_Home.png tab > Select Settings Icon_Settings.png > Period Prediction > Leave Beta. Note that if you leave the Beta, all Period Prediction-related data will be deleted, including your logged period start dates. If you decide to re-join, you’ll need to complete our short background questionnaire again.

Natural Cycles App Integration

Now, you can prevent or plan pregnancy with Natural Cycles, powered by Oura. The Natural Cycles app is the first birth control app, and it’s cleared by the FDA in the US and certified in Europe for use with a continuous wearable temperature trend monitor such as the Oura Ring.

If you have a Natural Cycles subscription, you can opt in to allow temperature trend data collected by your Oura Ring to be automatically synced to the Natural Cycles app. These temperature trends are then used to calculate your daily fertility status within the Natural Cycles app.

There are no changes to the Oura App, and the integration is available to Gen2 users and Gen3 users with active membership.

For more information, see our App integrations article or visit the Natural Cycles page.

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