If the amount of 80ml is converted into the amount of sanitary napkins used, then about 10 pieces of sanitary napkins can be fully soaked to reach the amount of 80ml of menstruation, and the normal amount of menstruation in a menstrual cycle is about 20~60ml. The amount of menstrual flow can be indirectly reflected by the amount of sanitary napkins used, if the common daily sanitary napkin is used as a measurement, 80 ml of menstrual flow can be soaked up by 10 pieces of daily sanitary napkins, in addition, for those who use a menstrual cup, a small measuring cup can be used to measure the amount of menstrual blood in the menstrual cup every time the cup is poured out. The normal amount of menstrual flow in a menstrual cycle is about 20~60ml, when the amount of menstrual flow is greater than 80ml, it is excessive menstruation, endometrial hyperplasia, endometrial polyps, uterine fibroids and other diseases can lead to excessive menstruation. If you find that your menstrual flow is greater than 80ml, please consult a doctor to find out the cause of your menstrual flow and ask the doctor to take care of it.