Information about menstruation for the public, patients and researchers, as well as personal experiences from people who menstruate. What is menstruation? Menstruation occurs when the lining of the womb (the endometrium) is shed. Normal menstruation So what is 'typical menstruation'? There appears to be lots of variation, not only between different women but also from one cycle to the next in one woman. Menstrual disorders It is really important to get an accurate diagnosis of the cause of problematic menstrual bleeding to make sure the treatment you receive is the right one. Patient information Information on investigations and treatments for periods. Personal stories Members of Flow Right PPI group share their personal experiences of heavy menstrual bleeding. For clinicians and researchers Guidelines and information to help and advise clinicians and researchers. This article was published on 2024-11-05