Period & Cycle Tracker

A month on a page

A grid of days one to thirty-one, each markable for period, flow and mood, with a symptoms and notes table underneath — six to sixteen rows of it, your choice. The month label at the top is blank, so the same sheet works for any month.

Print several and keep them together. One cycle tells you almost nothing; six in a row tell you what is normal for you, which is the only definition of normal that matters here.

Why "normal" is not one number

The textbook 28-day cycle is an average, not a rule, and remarkably few people run to it exactly.

Anything from roughly 21 to 35 days is common in adults, and the same person varies month to month. Your own consistency matters far more than the number: a cycle that has run at 33 days for a year is not a problem, while one that has been 28 for a year and is suddenly 45 is worth mentioning.

That is exactly what a tracker gives you and memory does not.

What to record

Start date first, always. Cycle length runs from the first day of one period to the day before the next — not from the end of one to the start of the next, which is what people assume and is why so many report the wrong number to a GP.

Then flow, and then symptoms: cramping, headaches, mood, sleep, skin, digestion, energy. Symptoms are where the useful patterns turn up, because they often cluster at a predictable point in the cycle and are far easier to manage once expected.

Prediction, honestly

A few months of data lets you estimate the next start date reasonably well, and that is worth having for a holiday, an exam or a long journey.

It is an estimate. Cycles shift with illness. With stress, with travel, with a change in exercise or weight. No amount of tracking makes them precise. Anyone using this for contraception should know that fertility-awareness methods need far more than a cycle length — temperature and cervical mucus at minimum, and proper instruction — and are considerably less reliable than they sound when practised casually.

Paper rather than an app

Cycle apps are convenient and they hold detailed health data about you, sometimes on servers in another jurisdiction, occasionally with sharing arrangements that are not obvious from the interface.

A sheet of paper in a drawer has none of those properties. For some people that is decisive, and it is a reasonable thing to want.

When to see someone

Bring the sheet if you do. Bleeding that is unusually heavy, cycles that have changed markedly, periods that stop, severe pain that interferes with normal life, or bleeding between cycles are all worth a GP appointment — and a few months of records makes that conversation far shorter and far more useful.