How many days does the menstrual period usually last?

The menstrual cycle is generally 2 1 ~ 35 days, with an average of 28 days.

Menstruation refers to periodic shedding and bleeding of endometrium, accompanied by periodic ovulation of ovary. The appearance of menstrual regularity is one of the signs of mature reproductive function. Normal menstruation is periodic, and the first day of bleeding is the beginning of menstrual cycle. The interval between two adjacent menstrual periods on the first day is called a menstrual cycle, which is generally 2 1 ~ 35 days, with an average of 28 days. The duration of each menstrual period is menstrual period, usually two to seven days, once every three to five days.