How to track perimenopause: what to log and why it helps

Why tracking helps more in perimenopause

Perimenopause is mostly recognized by pattern: cycles that drift, symptoms that cluster, mood that changes in ways that don't match your life. In the UK, NICE guidance says that for people over 45, doctors usually diagnose perimenopause from symptoms and cycle changes alone, without blood tests, because hormone levels jump around too much day to day to be useful. That makes your own record the most useful test there is.

• It turns vague into concrete. 'I've not felt right for months' becomes 'my cycles went from 28 to between 22 and 41 days, and I've had night sweats 4 nights a week'.
• It shows what follows your cycle. Some symptoms cluster before periods; others don't. That changes what helps.
• It shows whether treatment works. If you start HRT or another treatment, before-and-after data is far better than memory.
• It's reassuring. Seeing that a rough week came right before a period, like the last three, makes it feel less random.

What to track

How long, and what to look for

Track for at least three months before drawing conclusions; six is better. Then look for:

1. Cycle variability. Do cycle lengths now differ by 7 days or more from one cycle to the next? That's the research marker for early perimenopause. Gaps of 60 days or more suggest the late stage. The cycle length calculator helps.
2. Flow changes. Are some periods much heavier than they used to be? Note how often you change products on the heaviest day.
3. Mood timing. Line up your mood with cycle days. Do low or irritable days cluster before bleeding? Or are they spread out with flushes and bad nights?
4. Sleep and flush links. Do bad nights follow nights with sweats? That points to treating the flushes, not just the sleep.
5. Triggers. Alcohol, caffeine, stress and hot rooms commonly worsen flushes.

Paper, Apple Health or an app?

Any of them works if you use it. Paper is simple: one row per day with a few columns (see the mood tracker printable for a layout). Many period apps assume regular cycles, so their predictions can feel wrong in perimenopause; look for one that adapts to irregular cycles and lets you log mood and symptoms alongside bleeding. Comparing options? See perimenopause apps compared.

Bringing your record to the doctor

• Summarize the headline: how your cycle has changed, your top three symptoms, and how they affect your days.
• Bring the raw record too, in case they want detail.
• Say what you want help with: sleep, flushes, mood, heavy bleeding.
• Ask about HRT and non-hormonal options, and whether you still need contraception.

Built for changing cycles

Lulu's perimenopause mode is for cycles that no longer follow the old pattern. You log a period in a tap, symptoms as bunny drawings and mood in one tap, and Lulu shows how you usually feel across your cycle as it changes. No account is needed.

When to see a doctor (without waiting for data)