Cycle health tracking in the Google Health app can be used to help predict periods, check your estimated fertile window, and help you better know your body.
For step-by-step instructions on how to log your cycle data in the Google Health app, refer to Use the Google Health app to track your period.
Important:
- This feature is available in the Google Health app and works without a device.
- Period logging is also available on Sense 2, Versa 2, and Pixel Watch 3 and higher. On Sense 2 and Versa 2, it’s an optional tile you need to add and can’t be accessed directly from the Today tab.
Tip: Many things can affect your cycle, including medical conditions and medications, which can affect the accuracy of this feature.
During your menstrual cycle, the lining of the uterus thickens to prepare for the possibility of pregnancy and then sheds if pregnancy doesn't occur.
The shedding of the uterine lining is the bleeding phase of the cycle, also known as the period.
Your cycle starts on the first day of your period and ends the day before your next period.
You can better understand your body when you track your cycle. It can help you recognize any irregularities and identify cycle patterns that may be linked to other areas of your health.
Track your period in the Google Health app to learn about your typical period length, estimated fertile window and ovulation day, and other information related to your cycle. Log your periods consistently for more accurate predictions and greater insight into cycle patterns.
Once you log at least 1 period, you can access predictions of future periods and fertile windows.
For instructions on how to log a period or details, how to turn cycle health tracking on or off, or how to access predictions refer to Use the Google Health app to track your period.
The predictions for your period, fertile window, and cycle phases are estimated with an algorithm that includes the period and cycle length information you provide. It’s also affected by ovulation test results that you log.
If you don’t provide some all of these details, Google Health uses a 28-day cycle and 5-day period as a starting point for estimations. Your fertile window is always shown as 7 days in the Google Health app, which includes the 5 days before ovulation, the day of ovulation, and the day after ovulation.
Period and fertile window predictions become more personalized as you log your period consistently.
You can edit the average cycle length and period length you provided during setup. However, these settings only affect your initial predictions. For more information, refer to Use the Google Health app to track your period.Google Health uses the data you provide to estimate your predictions. Initially, your predictions take into account the average cycle and period lengths you provide during setup. Log your period consistently to receive more accurate predictions.
Google Health also relies on recent data. If you haven’t logged a period recently, it can take a few cycles for the predictions to catch up.
Google Health breaks the cycle into phases based on changes that happen in hormone levels.
- Follicular: This phase begins on the first day of your period and continues until the day before your ovulation day. The last 5 days of the follicular phase are known as the fertile window, a time when pregnancy is more likely. Fertile windows typically span 6 days, but in Google Health, it spans 7 days to account for variations in the time of day that ovulation occurs. Learn more about the Follicular phase.
- Ovulation: The day marks the release of a mature egg from the ovary. Due to its importance in the cycle, ovulation is highlighted as a distinct day.
- Luteal: The phase that begins after ovulation and ends the day before your next logged period. This hormonal shift leads to distinct physical changes that are often marked by a range of physical and emotional symptoms.
Check your cycle trends to track patterns in your cycle length, period length, ovulation day, cycle variability, and symptoms. For more information, refer to Use the Google Health app to track your period.
Can cycle health tracking tell me if I have an unusual cycle or a medical condition?
Your cycle health data helps you track your patterns and notice variations. Your cycle can be influenced by various factors, such as hormonal birth control, pregnancy, other health conditions, and lifestyle factors.
Hormonal birth control may affect ovulation and make predictions less accurate. You can still choose to get predictions if you wish. For more information, refer to Use the Google Health app to track your period.
If you have any concerns about your cycle, please consult a qualified healthcare provider.
Do I need to add my birth control method?
It’s not necessary to add your birth control method to use the cycle health tracking feature.
Can I share my period data?
You can choose to use your cycle health data to help facilitate conversations with your doctor. This provides a clearer picture of your cycle for more personalized care. At this time, you can’t directly share your cycle health tracking data from the Google Health app with anyone, including your partner.
Google Health invests heavily in security measures to protect consumer privacy and keep data safe. We use a combination of technical, administrative, and physical controls to maintain the security of user data. For more information, refer to How can I help secure my account and data?
Can I use my cycle health data for family planning?
Cycle health tracking helps you learn more about your cycle and recognize trends. While the cycle health tracking feature provides information about your estimated fertile window, always talk to your doctor for information on conception and pregnancy.
Can I log ovulation test results in the Google Health app?
Yes, you can log a positive ovulation predictor kit test. For instructions, refer to Use the Google Health app to track your period.
Can I log pregnancy test results in the Google Health app?
You can’t log pregnancy test results at this time. To use cycle health tracking during pregnancy, we recommend that you turn off predictions. For more information about how to turn off predictions, refer to Use the Google Health app to track your period.
Even if you don't track your cycle, you can use the feature to track symptoms, such as headaches. For more information about how to log details, refer to Use the Google Health app to track my period. If you have any concerns, talk to a qualified healthcare provider.
Is cycle health tracking available on a child account?
At this time, Cycle health tracking isn’t available in the Google Health app for children on family accounts. For more information about Fitbit family accounts, refer to How do I manage my child in the Google Health app?
Cycle health tracking isn’t intended to be used for contraceptives or other medical purposes. Google Health doesn’t guarantee or warrant that this feature can be used to achieve particular results. This feature may not accurately predict your cycles or related information.
This feature is intended only to help users monitor and keep track of certain information.