Insights into women’s health from the length of their menstrual periods

　　Under normal circumstances, most people's menstrual cycle is about 28 days, the number of menstrual days is 4 to 7 days, and the average menstrual blood volume is about 35 ml. If the menstrual blood volume is more than 80 ml, it is called polymenorrhea; if the menstrual blood volume is less than 20 ml, it is called oligomenorrhea. The length of the menstrual cycle varies from person to person, and is within the normal range from 20 to 40 days, and each female Menstrual dates have their own regularity.

　　Normal menstruation is a sign that the female internal genitalia is developing normally and functioning well. Periodic vaginal bleeding in a woman is called menstruation. To measure whether a woman's menstruation is normal, it can generally be judged from the following aspects.