How long is a normal menstrual cycle?

Many women are careless and do not pay attention to their menstrual cycle. This is a bad habit. It is recommended that you record it with paper and pen. In addition, for convenience, you can use your mobile phone to record the menstrual cycle. In this way, you can know whether the menstrual cycle is normal. Under normal circumstances, a woman’s menstrual cycle is about 28 days, but it is normal to be a few days earlier or later. The following is a detailed introduction to this knowledge.

How long is a normal menstrual cycle?

How many days is a normal menstrual cycle? The menstrual cycle is generally 21-35 days, with an average of 28 days.

Normal menstruation is cyclical. How to calculate the menstrual cycle? The first day of menstrual bleeding is regarded as the beginning of the menstrual cycle, and the interval between the first days of two menstrual periods is called a menstrual cycle. How many days is a normal menstrual cycle? The length of a woman's menstrual cycle varies from person to person. The menstrual cycle is generally 28 days. Occasionally, it may be advanced or delayed by no more than 7 days and is still considered normal. In other words, the menstrual cycle should not be less than 21 days and not more than 35 days. Such a menstrual cycle is normal.

The first step is to determine the exact time to start calculating the menstrual cycle

In order to calculate your menstrual cycle, you must first determine which day to start counting from. There is an obvious misunderstanding here, that is, whether to count from the day the menstruation starts or the day the menstruation ends.

The accurate calculation should be based on the day your period starts.

For example, if your period starts on February 6th and ends on February 10th. Then it should be counted from February 6th.

Step 2: Calculate the N1 portion of the menstrual cycle

What is N1? It is the number of days in the menstrual cycle in the month of the last menstrual period.

Let's use the same example as above. The last menstrual period started on February 6th. Now I check the calendar and find that there are 28 days in February 2014.

Then, we can calculate

N1=28-6=22 (days)

That is, the menstrual cycle lasted 22 days in February 2014.

Step 3: Calculate the N2 portion of the menstrual cycle

What is N2? It is the number of days in the menstrual cycle during this month of menstruation.

In the above example, this time the menstruation starts on March 4th.

Then, we can calculate

N2=4-1=3 (days)

Why subtract 1? Because March 4th should be counted into the next menstrual cycle.