How to calculate a woman’s safe period?

　　How to calculate the safe period of ovulation

　　Normal women of childbearing age have menstruation once a month. The period from the beginning of this menstrual period to the first day of the next menstrual period is called a menstrual cycle. For example, from the perspective of contraception, each menstrual cycle of a woman can be divided into menstrual period, ovulation period and safe period. This kind of contraception is a method of contraception that stops sexual intercourse during ovulation. This is a traditional contraceptive method and was one of the commonly used contraceptive methods at home and abroad before the advent of the "Drug List" and the intrauterine device. A woman's ovulation date is generally about 14 days before her next menstrual period. After the egg is discharged from the ovary, it can survive in the fallopian tube for 1 to 2 days, waiting for fertilization: Men's sperm Can it be maintained in a woman’s reproductive tract for 2? The fertilization ability is 3 days, so it is easier for couples to get pregnant in the few days before and after the egg is released. For the sake of safety, we call the 5 days before and 4 days after the ovulation day, including the ovulation day, a total of 10 days as the ovulation period. Because it is easy for couples to get pregnant during the ovulation period, the ovulation period is also called the fertile period or the dangerous period.

　　How to calculate the safety period?

　　The safety period is divided into before and after ovulation. The period from the day of menstruation to the day before ovulation begins is the period before ovulation. From the first day after ovulation to the day before the next menstrual cramps is the safety period after ovulation. It is safer after ovulation than before. This is because some women sometimes ovulate early due to environmental changes and mood swings, which shortens the time before ovulation without them knowing it, making it unsafe before ovulation. The chance of the ovary ovulating twice in one menstrual cycle is very rare. That is, the second ovulation will generally not occur between ovulation and the next menstrual period. Therefore, it is safer after ovulation. The key to using this method of contraception is to determine the woman's ovulation date. There is generally no special feeling when the ovary ovulates, although some women may experience ejaculation. stomach ache , backache, breast swelling and mood changes, etc., but these phenomena are not specific symptoms of ovulation, so they cannot be used as the basis for ovulation. Menstruation and ovulation change cyclically, and there is a close relationship between the two. If you master the change patterns of the two, you can determine the ovulation date through indirect methods. There are many methods to determine the date of ovulation, and the methods that women can master by themselves include: calculating based on the menstrual cycle, measuring basal body temperature, and observing cervical mucus secretion.