How to Track Your Cycle with PCOS: A Practical Guide

Many women with PCOS I work with describe feeling lost when it comes to their cycles. “My app says I should be ovulating today, but I haven’t had a period in months.” Others share with me the frustration they have of never seeing a positive ovulation test, despite trying month after month. Unfortunately these experiences are not unusual. Tracking cycles in PCOS is complex, and often the tools designed for “average” cycles just don’t work.

In this blog, we will look at why tracking feels confusing in PCOS, what you can track more reliably, and how wearable and digital fertility trackers fit into the picture.

Why cycle tracking feels confusing with PCOS

Most fertility awareness methods and apps are designed around the assumption of a 28-day cycle, with ovulation on day 14. For women with PCOS, cycles are often longer, shorter, or unpredictable, and ovulation may happen later, less frequently, or not at all. This makes standard predictions inaccurate.

There are also unique challenges:

• Elevated luteinising hormone (LH): Ovulation predictor kits (OPKs) measure LH, which normally surges before ovulation. In PCOS, LH can already be high at baseline, leading to false positives.
• Anovulatory cycles: Some women experience monthly bleeding but without ovulation, making cycles appear “regular” when ovulation isn’t occurring.
• Unreliable signals: Changes in cervical mucus or basal body temperature may still occur, but they can be harder to interpret in PCOS. See below for further details.

This combination of irregular cycles, altered hormone levels, and inconsistent signals makes tracking with PCOS uniquely challenging — but not impossible.

How to track cervical mucus

Cervical mucus is one of the most useful signs of fertility. Rising oestrogen around ovulation makes mucus clearer, wetter, and more slippery. After ovulation, progesterone thickens mucus again. In PCOS, these patterns can be less predictable, but paying attention over time can still reveal valuable information.

• Check daily: Once a day, observe mucus either by wiping with toilet paper, collecting a small sample with clean fingers, or noting changes in your underwear.
• Look for changes: Record whether mucus is dry, sticky, creamy, watery, or stretchy. The “egg-white” type (clear and stretchy) is typically associated with higher fertility.
• Notice sensation: Pay attention to whether you feel dry, damp, or slippery.

Because hormone fluctuations in PCOS can produce mucus without actual ovulation, this method is not perfect, but it can still offer insight into your unique patterns.

How to track basal body temperature (BBT)

Basal body temperature can help confirm that ovulation has happened. Progesterone released after ovulation raises resting body temperature slightly.

• How to measure: Use a sensitive thermometer and take your temperature every morning immediately after waking, before getting out of bed or drinking anything. Try to do this at the same time each day.
• What to expect: If ovulation occurs, you may see a small but sustained temperature rise that lasts until your next period.
• Limitations: Poor sleep, illness, alcohol, or stress can all affect readings. In PCOS, the rise may be less clear or inconsistent.

BBT confirms ovulation after the fact but cannot predict it. It works best alongside other methods rather than on its own.

Journal your cycle

Keep a record of your cycle so you can find out what is happening for you. Consistency matters more than the format you choose. Options include:

• Paper journals or charts: A fertility notebook or calendar lets you write down daily observations of mucus, temperature, and symptoms.
• Digital logs: Some apps allow you to record data without relying on their predictions. This can be helpful if you prefer to store everything in one place.
• Spreadsheets: Customisable, and especially useful if you like visualising data over time.

The aim is to notice your patterns, not to fit your cycle into a textbook model.

Can new technologies help?

Wearable devices and fertility trackers are becoming increasingly popular. Many women use them already for sleep, fitness, or general wellbeing, but can they can also help with cycle tracking in PCOS?

Here is an overview of some of the options currently available. This is for information only (we are not affiliated with or endorsing any company, and this should not be taken as a product recommendation):

• Oura Ring: Measures temperature, heart rate variability, and sleep. Useful for spotting overall trends but designed for women with regular cycles. Predictions may be less reliable in PCOS.
• Tempdrop: A wearable thermometer worn on the arm overnight. It can make BBT tracking easier for women who struggle with consistent wake-up times. However, like all BBT devices, it confirms ovulation after it happens rather than predicting it.
• Ava Bracelet: Worn overnight, measuring multiple signals such as temperature, pulse rate, and breathing. Data may be less accurate in very irregular cycles.
• OvuSense: A vaginal sensor that measures core body temperature continuously. It claims to work better in irregular cycles but some women say it can feel invasive and is more expensive.
• kegg: A device that measures electrolyte changes in cervical mucus. Potentially useful, but relies on good mucus production, which may not always be the case in PCOS.
• Mira Fertility Tracker: Mira is a home urine test system that measures hormones including LH, oestrogen, and progesterone metabolites, giving numerical values rather than simple positives/negatives. This can be more useful for PCOS because it tracks multiple hormones, though interpretation may still be tricky with irregular cycles and consistently elevated LH.
• Natural Cycles: This app uses basal body temperature data (and in some cases Oura Ring integration) to predict fertile days. Again, its accuracy depends on regular cycles and consistent ovulation. In PCOS, where ovulation is unpredictable, the app may label long stretches of “red” (fertile) days, which can be frustrating and limiting.

Emerging devices are also starting to measure saliva hormones or combine multiple parameters. While promising, most have not been thoroughly validated in women with PCOS.

The bottom line: Technology can be a helpful tool, but in PCOS it is best seen as an additional source of information rather than a standalone solution. Combining data from wearables with your own observations and professional support often provides the clearest picture.

When to seek professional support

If your tracking leaves you feeling more confused than informed, it may be time to seek support. In PCOS, ovulation is not always straightforward, and trying to decode apps or devices alone can feel overwhelming.

While cycle tracking can provide useful insights, it is not a diagnostic tool. If you have very infrequent periods (fewer than four per year), prolonged cycles (longer than 35–40 days), or symptoms that interfere significantly with your quality of life, medical assessment is important.  Your GP or specialist can rule out other causes, offer medical investigations, and discuss options for managing PCOS. Nutrition and lifestyle support can work alongside medical care, but they are not a substitute for it.

Working with a qualified practitioner can help you interpret your data and understand what it means in the bigger picture of your health. If you are trying to conceive, fertility specialists can also advise on medical options when needed. Don’t hesitate to book a call with us if you’d like to talk further.

For more detail on how nutrition and lifestyle support ovulation in PCOS, see our article: Understanding Ovulation and Fertility Challenges in PCOS.

Please note, we do not endorse or sell any products mentioned. Devices should be chosen with professional guidance.