How to calculate the menstrual cycle

The calculation of the menstrual cycle is from the first day of the current menstrual period to the first day of the next menstrual period. The calculation of the menstrual cycle should include the time of menarche. For example, the first day of the last menstrual period is September 31st, and the first day of the previous menstrual period is September 1st. The number obtained by subtracting the two dates is 30, which means that the menstrual cycle is 30 days.

Under normal circumstances, women's menstrual cycle is 28 to 32 days. Due to individual differences, the length of the menstrual cycle can vary from person to person. A week earlier or later can be considered normal. As long as a certain periodicity can be maintained, it cannot be considered as irregular menstruation.

Also, when many women visit the gynecologist, they are usually asked by the doctor about the due date of pregnancy. The due date of pregnancy refers to the time of the menstrual period closest to the date of consultation, which needs to be calculated from the first day of bleeding.

When you have your first menstruation, because the uterus and ovaries are in the development stage and their functions are not yet perfect, there will be neurological disorders and irregularities, resulting in abnormal menstrual cycles. This is normal and there is no need to worry. With the increase of age, the ovaries will gradually grow and develop, and the menstrual cycle will become regular.