Many friends are not very clear about the ovulation period. I think that ovulation is a common physiological manifestation of women. Tell us that if we know the time of ovulation, we can accurately prepare for pregnancy or contraception. It is helpful for our sexual life, so it is good for us all to know the knowledge about ovulation. How do you calculate the ovulation period? 1. Aquino Aquino method is also called the mathematical formula method, that is, from the menstrual cycle. The last day (that is, the first day of the next menstrual period) is pushed 14 to 15 days before the ovulation day. If the day of the next menstrual cramp is the Nth day, then this ovulation day is the N14th day. Although the length of the menstrual cycle varies from person to person, even if the length of each person’s cycle is not the same, the life expectancy of most people in the luteal phase is 14 days, which is constant. The change of menstrual cycle is due to different follicular phase. Caused. So we can use the mathematical formula to simply predict the ovulation day. For example, in terms of contraception, each menstrual cycle of a woman can be divided into a menstrual period, an ovulation period, and a safe period. The ovulation date of a woman is generally about 14 days before the next menstrual cramp, the first 5 days and the last 4 days of the ovulation day, together with the ovulation day for 10 days, called the ovulation period. For example, if the menstruation is on the 1st, the next menstrual period will come on the 29th, the ovulation day is the 15th of this month, and the ovulation period is the 10th to the 19th of this month. Expert comment: This ovulation day test method is rarely used, and some female friends will choose such methods, but most women are more complicated and complicated. Second, cervical mucus method Cervical mucus will appear throughout the menstrual cycle, and it has subtle cyclical changes. We know that the endometrial gland cells of the cervix can secrete mucus, and the secretion of mucus and its chemical and physical properties have obvious periodic changes. Just after menstruation, the amount of mucus secretion gradually increases, and gradually becomes thin and transparent, similar to egg white, reaching a peak before ovulation. It can also be said that the day with the highest amount of mucus, the highest probability of ovulation. At this point, use your fingers to reach into the depths of the vagina, and apply some mucus from the cervix to pull the mucus into filaments up to 10 cm. After ovulation, under the action of progesterone, the secretion of mucus is significantly reduced, thick and turbid, poor ductility, and easy to break when drawing. If you observe and record the mucus status every night and understand the changes in mucus, you can easily find your own ovulation day. Expert comment: This ovulation day test method will be used by individual female friends. After all, this method can be used in women’s bathing, in front of the same room, changing clothes or going to the toilet. A little test. The method is simple and easy to operate.