MEDICAL PHYSIOLOGY

Detailed explanation-1: -The length of the menstrual cycle varies from woman to woman, but the average is to have periods every 28 days. Regular cycles that are longer or shorter than this, from 23 to 35 days, are normal. The menstrual cycle is the time from the first day of a woman’s period to the day before her next period.

Detailed explanation-2: -In a normal 28 day menstrual cycle you would expect menstruation to last approximately 3-5 days. During menstruation the entire endometrium is shed. During menstruation only the functional layer of the endometrium is shed, with the basal layer remaining intact.