Perimenopause Tracking Comes to Apple Watch: How watchOS 27 Works

Here is the short version: starting Monday, September 14, the Health app can flag when your logged cycle patterns look like perimenopause. The feature is part of watchOS 27 and iOS 27, it only appears for users 40 and over, and it is a nudge to talk to your doctor, not a diagnosis.

Apple announced the feature at WWDC in June and confirmed the details in its September 9 press release. It arrives two days from now. That matters, because perimenopause is easy to miss in real life. Symptoms can start years before your last period, and many people do not recognize what is happening to their sleep, their cycles, and their energy during that time.

The short answer

• What ships Monday: Cycle Tracking can send a notification when your logged cycle patterns are suggestive of perimenopause, for users age 40 and over.
• Also new: you can log that you are in perimenopause or menopause, track symptoms, and read educational articles in the Health app.
• Safety net: if you log bleeding after menopause, the Health app tells you to speak with your doctor.
• Limits: it reads the patterns you logged, not hormones. Apple states plainly that it does not replace diagnosis, monitoring, or treatment.

What exactly ships on September 14

Per Apple's announcement:

• Perimenopause notifications. Cycle Tracking compares your logged cycles against your history. When the pattern suggests perimenopause, you get a notification. The feature is gated to age 40 and above.
• Life-stage logging. You can tell the Health app you are in perimenopause or menopause, and Cycle Tracking adjusts its predictions and customization to match.
• Symptom tracking. Log symptoms alongside your cycle data and watch them over time.
• Education. Articles developed with clinical experts live inside the Health app.
• Post-menopause bleeding alert. Bleeding after menopause deserves a doctor's visit, and the app now says so directly.

watchOS 27 runs on Apple Watch Series 9 and later, SE 3, and Ultra 2 and later, and requires an iPhone 11 or newer with iOS 27. The perimenopause features are part of the Health app experience, not the new sensors, so they are not limited to the Series 12.

How to set it up

1. Update your iPhone to iOS 27 and your watch to watchOS 27 on September 14.
2. Open the Health app, tap Cycle Tracking, and make sure you have been logging your periods. The feature reads your logged history, so it cannot work on day one without data.
3. Set your life stage if you already know you are in perimenopause or menopause.
4. Log symptoms when they happen. This is the part most people skip, and it is the part that makes patterns visible.
5. Keep logging. The notification comes from deviations across your cycles, which takes months of data, not days.

Why Apple built this

Perimenopause is the stretch of irregular cycles before menopause, which most often arrives near age 51. The transition can run four years or longer and often starts in the mid-40s. Because irregular periods can look like normal variation, many people spend years treating symptoms one at a time: bad sleep, hot flashes, a cycle that shows up whenever it wants.

Apple's own explanation is blunt about the gap. Many people do not recognize they are in perimenopause because the symptoms can start years before their last period. A notification gives them something concrete to bring to a doctor's appointment.

A wearable helps here in one specific way. Your watch sees the whole picture every night: cycle length, sleep quality, overnight heart rate, wrist temperature. The sleep piece matters more than it sounds, because disturbed sleep is one of the most common perimenopause complaints and the one you can measure objectively. watchOS 27 also improves sleep tracking itself, so the same release sharpens the tool that perimenopause disrupts. If you want the details, we covered the sleep and cycle changes in watchOS 27 back in August.

What it cannot do

• It is not a diagnosis. Apple's fine print says the notifications are not intended to replace diagnosis, monitoring, or treatment. The point is a better conversation with your doctor.
• It needs your logs. The feature works from Cycle Tracking entries. If you stopped logging because your cycle got strange, start again.
• It is not for contraception. Apple states that Cycle Tracking should not be used as a form of birth control.
• It is age-gated. Under 40 with irregular cycles still warrants a doctor's conversation. This notification will not fire.
• No hormones are measured. No consumer wearable measures estradiol or FSH today. A watch sees the downstream pattern. Only bloodwork can see the hormones, and even then doctors mostly diagnose from symptoms and cycle history.

If you are already tracking symptoms, the rest of the picture is the stuff around the cycle: your sleep scores, your resting heart rate, your energy. Ness reads those signals from Apple Health and its coach connects them to your logged meals and sleep, at $12.99/month or $79.99/year.

FAQ

Does this work on any Apple Watch? The feature ships with watchOS 27, which runs on Series 9 and later, SE 3, and Ultra 2 and later. It is software, so it is not limited to the Series 12.

Will it tell me I am in perimenopause? It will send a notification that your logged patterns are suggestive of perimenopause. Diagnosis remains your doctor's job.

What if my cycles are irregular for another reason? Irregularity has many causes, including stress, thyroid issues, and pregnancy. Treat the notification as a reason to talk to a doctor, not an answer.

Related reading

• watchOS 27 Health Features: What's Changing on Your Watch This Fall
• Apple Watch Sleep Score: What's Good, What It Misses
• Apple Health Age: What It Is and How It Compares

Sources

1. Apple Newsroom. Apple advances health and fitness capabilities using Apple Intelligence and the most accurate heart rate sensing in a wearable, September 9, 2026. Perimenopause and menopause support, notification criteria, September 14 availability.
2. 9to5Mac. watchOS 27 adds three new Health upgrades for Apple Watch, July 6, 2026. Notification fine print and age gating.
3. MacRumors. iOS 27 Adds Perimenopause and Menopause Tracking, June 8, 2026. Feature announced at WWDC.
4. Apple. Health. Cycle Tracking, symptom logging, and predictions.
5. MedlinePlus. Menopause. Average age at menopause.

Nothing here is medical advice. The perimenopause notification is a screening nudge, not a diagnosis. If you have symptoms, see a physician.