Is it normal for menstruation to be a few days early or late?

Patient's question:

No

Doctor's answer:

Hello! A normal menstrual cycle is between 20-30 days, and it is considered normal if it is advanced or delayed by one week.
Advice: There are many factors that can affect menstruation, and it is normal for it to occasionally be a few days early or late. Wishing you good health!