There is no medical standard for menstrual flow. Besides, the menstrual flow is not fixed. Every time it is related to the changes of hormone levels in the body and the changes of your living habits and emotions. What determines the amount of menstruation is the thickness of your endometrium. The thicker, the better. On the contrary, there will be less. The thickness of the endometrium is also different in each menstrual cycle, which depends on the hormone level, and the hormone level is affected by your emotional life habits, so don't worry if it appears occasionally, as long as the body is not too uncomfortable.

Guiding opinions:

Generally, 30ml menstrual flow is too little and 180ml is too much. Normal should be 60 ml each time. This requires us to pay attention to the use of sanitary napkins at ordinary times, and not more than two packs per cycle. If it is not enough to use three packs of sanitary napkins every time, each sanitary napkin is soaked, which belongs to menorrhagia; On the contrary, if you can't use up a pack of menstruation at a time, it is too little menstruation, so you should see a doctor as soon as possible. There are great individual differences in menstrual cycle. Some people have as little as 20 days, while others have as many as 36 days. This period is normal.