Cycle basics
Period length and cycle variation
Awaiting clinical reviewSome variation is common. A difference of more than about 7–9 days between cycles is worth tracking and discussing.
Stress, travel, illness, weight changes, exercise and some medications can shift your cycle.
A period usually lasts 2–7 days. Tracking several months gives a clearer picture than any single cycle.
When to seek medical assessment
- Your cycle length varies a lot month to month.
- Bleeding regularly lasts more than 7 days.
Practical next steps
- Record at least three cycles before drawing conclusions.
- Mark dates you are unsure of as estimated.
Sources
Version 0.1-draft · Reviewer: pending · Review date: pending