When does the menstrual cycle start?

Although menstruation is a relatively normal physiological stage for girls and a physiological need that begins in childhood, many girls still do not know enough about their menstrual periods. When their menstrual periods are abnormal, they cannot find out immediately. So when does the menstrual cycle start? How to shorten the menstrual cycle?

When does the menstrual cycle start?

The menstrual cycle refers to the time from the first day of this menstruation to the first day of the next menstruation. The time in between is the physiological cycle, and the physiological period refers to the time from the first day of menstruation to the last day of menstruation. Normally, a woman's menstrual cycle is 21 to 35 days, and the menstrual period is 2 to 7 days. However, not all women fall into this category. About 40% of women do not fall into this category and have their own fixed physiological cycles and menstrual periods. These situations are all normal and do not require special care.

Menstruation is the regular shedding and bleeding of the uterine wall that occurs with the regular changes in the uterus and ovaries. Regular menstrual cycles are an important indicator of a woman's reproductive function. Normal menstruation is regular, not irregular. So, when does the menstrual period start to be counted? Generally, the menstrual period starts from the first day of bleeding. The first day of bleeding is the beginning of your period. The time period from menstruation to the first day of the next menstrual period is called a physiological cycle. Women's menstrual cycle is generally 21-35 days, with an average of 28 days. If the menstrual cycle is shorter than 21 days, it is called a short menstrual cycle. If it exceeds 40 days, it means that the menstrual cycle is too long. A menstrual cycle that is too short or too long is considered an abnormal menstrual period, which is related to the imbalance of women's estrogen levels. At this time, six sex hormone tests are needed, and menstrual regulation treatment should be carried out when necessary.

Reduced menstrual cycle

The shortening of the menstrual cycle is closely related to endocrine. After menstruation, the uterine wall begins to grow and develop, relying on estrogen at this time. The egg cell grows slowly and is released during the ovulation period. At this time, the estrogen level is the lowest. After the egg is released, the egg locks and produces progesterone, which begins to secrete progesterone, which can promote the further growth of the uterine wall. The lifespan of progesterone can determine the duration of the menstrual cycle. If the progesterone life is normal, the menstrual period can come normally. If the progesterone contracts prematurely, the menstrual cycle will be shortened, which is manifested as early menstruation. If the progesterone does not contract at the normal time, the uterine wall may continue to grow, which will cause amenorrhea and excessive thickness of the uterine wall, which is manifested as shortened menstrual period.