How long is a normal menstrual cycle?

Patient's question:

No

Doctor's answer:

Generally, it takes 28-30 days, but it varies from person to person. There are also cases ranging from 23-45 days, or even 3 months or half a year as one cycle. As long as it is regular, it is generally considered normal menstruation. The duration of bleeding is usually 2-7 days, and the total amount of blood loss during each menstrual period is 30-50ml. Some people believe that menstrual bleeding exceeding 80ml is a pathological condition.