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How your menstrual cycle works

Dr Louisa Draper

"A normal menstrual cycle can last 21 to 35 days. It varies from woman to woman and from month to month."

Dr Louisa Draper

A normal menstrual cycle can last 21 to 35 days. It varies from woman to woman and from month to month. Day one of your cycle is the day that your bleeding starts and it’s common for this to last up to seven days. In women who have recently started their periods, cycles can be longer and they tend to get shorter with age.