From the time a woman reaches puberty, shedding and bleeding of the lining of the uterus occurs once a month, which is called menstruation.

Under normal circumstances, a woman’s menstrual cycle starts to be irregular when she is 12-14 years old, and gradually becomes regular after 1-2 years. Menstruation gradually stops around the age of 45, and the time after menopause is called menopause. According to survey statistics, a woman’s bleeding volume during each menstrual period is about 75 milliliters. Calculating a woman’s menstrual period for 30 years, the total bleeding volume is about 27,000 milliliters (excluding childbirth bleeding), which is equivalent to 5.5 people weighing 60 kilograms. The total amount of blood in the body.

Women have so much physiological bleeding throughout their lives, but it does not affect their health. There is also a lot of data showing that the average life span of women is longer than that of men. Although the reasons here are complicated, from the perspective of blood physiology, it is related to this unique physiological characteristic of women. This is because women's long-term small amount of bleeding stimulates the function of the hematopoietic organs in the body to be more vigorous, which not only helps to improve the blood circulation in the body, but also comprehensively improves the activity functions of various organs, tissue cells within the body.

This unique physiological characteristic of women brings them health and longevity, or it can be said to be a special "gift" bestowed by the "Creator" on the great mother of mankind.

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