How to calculate a woman's physiological period?

The calculation method of physiological period is from the first day of this menstruation to the first day of the next menstruation as a menstrual cycle, that is, physiological period.

The normal physiological period of women is about 28 days, and there may be deviations occasionally. Menstruation is one week earlier or one week later, that is, 2 1-35 days belongs to the normal range, so it can be counted from the beginning of this menstruation to the first day of the next menstruation.

The physiological period is a woman's menstrual period. Because women's ovaries ovulate periodically and secrete estrogen and progesterone at the same time, under the action of estrogen and progesterone, the endometrium will periodically proliferate, secrete and fall off, and the endometrium and its fragments will fall off periodically, resulting in vaginal bleeding, which lasts for 3-7 days and the amount of bleeding is 20-80 ml, the most on the second and third days. Menstrual blood is dark red,no. The 1 day of each bleeding is the beginning of the physiological period and the 1 menstrual cycle, which refers to the interval from the 1 day of menstrual cramp to the 1 day of the next menstrual cramp, including menstrual period, ovulation period and late ovulation. After ovulation, you can use ultrasound or ovulation test paper to confirm the ovulation date.