How many days is normal between periods?

Under normal circumstances, the interval between menstruation should not be less than 24 days. It should not exceed 40 days at most. If it reaches 24 or 40 days every month, it is also normal. The total number of days of delayed and advanced menstruation should not exceed 10 days to be considered normal. If the menstrual period is sometimes early and sometimes delayed, it is an abnormal manifestation. The first thing to consider is endocrine problems. Usually, emotional anxiety, too much work pressure, or staying up too late, sudden changes in climate, sudden cold or sudden warming, can affect the endocrine system and cause menstrual disorders.

It is normal for the menstrual period to last 25 to 35 days. The menstrual cycle refers to the time interval between the first day of two menstrual periods. Under normal circumstances, it is between 28-30 days, but some people may have early or delayed time, so between 25 and 35 days is considered normal. If the menstrual period comes more than a week earlier, this condition is called a short menstrual cycle, and it is often associated with luteal insufficiency. If the menstrual cycle is delayed for more than a week, female hormones should also be tested. In addition, you should pay attention to your life routine, avoid staying up late, and maintain a stable mood.

If the interval between the first day of the second menstruation is more than 21 days, it is normal, but if it exceeds 35 days, it is abnormal. A menstrual cycle of less than 21 days is called too short, and a menstrual cycle of more than 35 days is called too long, both of which are abnormal. The main reason for a short menstrual cycle is that there is no ovulation period. Without ovulation, there is no estrogen, and the uterine wall will experience estrogen breakthrough bleeding under the effect of a single estrogen. Without estrogen resistance, menstruation will come early. If it exceeds 35 days, it means that the menstruation is infrequent, which may be caused by abnormal ovulation or no ovulation, and further regular examination and treatment are needed.

The normal interval between menstruation is usually calculated according to the menstrual cycle. The first day of bleeding is the beginning of the menstrual cycle, and the time interval between the first days of two menstrual periods is called a menstrual cycle. The menstrual cycle is generally between 21 and 35 days, with an average of 28 days. Every woman's menstrual cycle may be different, but as long as it is within 21-35 days, it is considered normal.