How many days does a menstrual period usually last? How much menstrual blood is normal?

Girls will always have their periods. The first menstruation is called menarche, and the age of menarche is mostly between 13 and 15 years old, but it may be as early as 11 to 12 years old, and as late as 17 to 18 years old. How many days does it usually take for girls to have their periods? Let's learn about some precautions about menstruation. The first day of bleeding (i.e., menstrual bleeding) is called the beginning of the menstrual cycle. The interval between the first days of two menstrual periods is called a menstrual cycle, which is generally 28 to 30 days, which is about the same as the length of a lunar month. The length of the cycle varies from person to person. Occasionally, it can be considered normal if it is advanced or delayed by no more than 7 days, that is, the menstrual cycle should not be less than 21 days, nor more than 35 days. Menstruation will stop during pregnancy and lactation. How many days does a woman's menstrual period usually last? Menstruation refers to the duration of menstrual bleeding. Normal menstruation lasts 2 to 7 days, generally 4 to 5 days. Menstrual volume refers to the amount of blood discharged during menstruation. The amount of menstrual volume is difficult to count. In clinical practice, the amount of menstrual volume is roughly estimated by how many times the menstrual pad is changed every day. Some people have determined that the amount of menstrual blood in normal people is about 10 to 58 ml, and the amount of menstrual blood in some women can exceed 100 ml. Some people believe that a monthly blood loss of more than 80 ml is a pathological state. Generally, the amount of bleeding is the largest on the second to third day of menstruation. Due to differences in personal physique, age, climate, region and living conditions, the amount of menstruation sometimes increases or decreases slightly, which is within the normal physiological range. Menstrual color refers to the color of menstrual blood. Menstrual blood is generally dark red, lighter in color at first, then gradually deepens, and finally turns light red and clean. In addition to blood, it also contains endometrial fragments, cervical mucus and vaginal epithelial cells. The main feature of menstrual blood is that it does not coagulate, but under normal circumstances, there are occasionally some small clots. Menstrual quality refers to the properties of menstrual blood. Under normal circumstances, the menstrual quality is neither thin nor thick, not easy to coagulate, no obvious blood clots, and no special smell. Pathological changes in menstrual quality are not only common menstrual diseases, but also an important basis for clinical syndrome differentiation. By understanding the changes in menstrual quality, important syndrome differentiation data can be provided for clinical practice. When women have their menstrual period and their menstrual blood is thick or sticky, it is called "thick menstrual blood".