How to calculate the safe period when the menstrual period is irregular

Many women who want to have sex worry about unwanted pregnancy. Although emergency contraception has the same effect as birth control pills, it is an effective contraceptive tool for women who do not want to get pregnant. However, all medicines are poisonous. If emergency contraceptives are taken for a long time, they will cause great harm to women's bodies. The safe period of menstruation is a relatively safe contraceptive measure for women. So is the day before menstruation the safe period of menstruation?

How to calculate the safe menstrual period when the menstrual period is irregular?

Generally speaking, the 7 days after menstruation is the safe menstrual period. The menstrual cycle is generally 28 days, and the optimization algorithm is based on the first day of menstruation and the day before the second menstruation. The ovulation period is in the middle of the menstrual cycle, which is the 14th day. If the egg cell is not pregnant, it can survive for 2 days, that is, the 14th, 15th and 16th days. The survival time of male sperm after entering the female genitalia is 3 days, and the rest of the time is the safe menstruation period. In order to prevent any accidents (early or late ovulation), we can push it back by 5 days. In this way, the 7 days after menstruation is the safe period of menstruation.

In addition, observing the changes in female secretions can also calculate how many days after menstruation is the safe menstruation period. Female secretions change objectively with the intervals of the menstrual cycle. During ovulation, the mucus increases, the female vagina feels damp, the mucus becomes clear, and the mucus can be drawn into wires, up to 10 centimeters long. The last day when this kind of mucus lasts is usually the ovulation period, and the couple should not have sexual intercourse for 3-4 days before and 5-7 days after ovulation.

Normal pregnant women have a menstrual period once a month. From the beginning of menarche to the first day of menarche of the next menarche, it is called a physiological cycle. For example, from the perspective of contraceptive measures, each physiological cycle of a woman can be divided into physiological period, ovulation period and safe menstruation period. Safe period contraception is a contraceptive measure that terminates sexual intercourse during the ovulation period. It is also a traditional contraceptive measure. Do you know that the days before menstruation are safe periods?

The 7 days before menstruation is the safe menstrual period. Its optimization algorithm is similar to the menstrual safety period after ovulation. The period from the day after the end of menstruation to the day before ovulation is the menstrual safety period before ovulation, and from the first day after ovulation to the day before the next menstrual menarche is the menstrual safety period after ovulation. The safe menstruation period after ovulation is safer than the safe menstruation period before ovulation. This is because some women sometimes affected by environmental damage and mood swings affect the advance of ovulation, this will shorten the safe menstruation period before ovulation, but they do not know it, so the safe menstruation period before ovulation is not safe. The ovary in one menstrual cycle has two eggs in a row opportunity is very rare, that is, after ovulation until the next menstrual menarche before this period of time usually won't happen again the second time of ovulation, so the menstrual safety period after ovulation is relatively safer than the safe period before ovulation.

Is the day before menstruation a safe period?

The safe menstrual period is a way to calculate contraceptive measures. Compared with contraceptive measures such as emergency contraception, calculating the safe period has fewer side effects, so it is chosen by most people. Traditionally speaking, seven days before menstruation and eight days after menstruation are the safe menstruation period for adult women. Normal women of childbearing age have a menstrual period once a month. From the beginning of menarche to the first day of menarche of the next menarche, it is called a physiological cycle. For example, from the perspective of contraception, each menstrual cycle of a woman can be divided into menstrual period, ovulation period and safe menstrual period. The safe period contraceptive method is a contraceptive measure that terminates sexual intercourse during the ovulation period. It is a traditional contraceptive measure and was one of the common contraceptive measures in countries around the world before the advent of emergency contraception and IUDs.

The safe menstrual period is divided into the safe menstrual period before ovulation and the safe menstrual period after ovulation. The period from the end of menstruation to the day before ovulation is the safe period before ovulation. From the first day after ovulation to the day before the next menstrual period is the safe period after ovulation. The safe menstruation period after ovulation is safer than the safe menstruation period before ovulation. This is because some women sometimes affected by environmental damage and mood swings affect the advance of the ovulation period, so before the ovulation period will be shortened, but they do not know, so before the ovulation period safety period is not safe. The ovaries in one menstrual cycle have two eggs in a row opportunity is very rare, that is, after ovulation until the next menstrual menarche before this period of time usually won't happen again the second time of ovulation, so the menstrual safety period after ovulation is relatively safe.

In addition to the calendar method using days to calculate, the safe period contraceptive method also includes the ovulation temperature method and secretion observation. However, the safe period contraceptive method is not absolutely safe. Sometimes women ovulate early or late, and the judgment of the safe menstrual period will become invalid. Identifying the safe menstrual period only reduces the chance of pregnancy.

How to calculate the safe menstrual period?

1. Calculation of physiological cycle: Both menstruation and ovulation are affected by the endocrine hormones of the hypothalamus-pituitary gland and uterus and ovaries and show regular changes. The length of their cycles is the same, both are one cycle per month, and ovulation occurs in the middle of two menstrual periods. Women's menstrual cycles vary in length, but the time interval between ovulation and the start of the next menstrual period is relatively fixed, usually about 14 days. Based on the relationship between ovulation and menstruation, the ovulation period can be calculated according to the physiological cycle. The calculation method is to count from the first day of the next menarche, and the last 14 days or minus 14 days is the ovulation period. The ovulation period plus the first 5 days and the last 4 days are called the ovulation period. Except for the menstrual period and ovulation period, the rest of the time is the safe menstruation period.

2. Ovulation temperature method: The body temperature of a normal person after waking up in the morning is generally the lowest body temperature of the day. For women of normal childbearing age, the body temperature generally rises by 0.3℃ to 0.5℃ after ovulation, and does not return to normal until the beginning of the next menstrual cycle. Use the trend of a woman's body temperature during ovulation to find her ovulation period, and abstain from sexual intercourse 3 to 4 days before and 5 to 7 days after. Of course, you are not allowed to have a fever or cold or take related medicines during this period.

3. Observation of female secretions: Female secretions change regularly with the different stages of the menstrual cycle. During ovulation, the amount of mucus increases, the female vagina feels damp and cold, the mucus becomes clear, and the mucus can be drawn into metal threads, up to 10 centimeters long. The last day this type of mucus lasts is usually the ovulation period. No sexual intercourse during the first 3-4 days and the last 5-7 days.

4. Ultrasonic monitoring of follicles: Ultrasound can identify eggs of 2-4mm (intravaginal ultrasound is clearer). Generally, it starts from the 9th day of the menstrual cycle and is observed once every 1-3 days. Through continuous observation, it can be seen that the egg is gradually growing and moving to the surface of the uterus and ovary. Mature follicles (>14mm) can be identified on the 9th to 12th day. Before ovulation, the egg grows 2-3mm per day. The mature follicles are 18-24mm (17mm during the natural cycle, >18mm with hMG stimulation, >20mm with clomiphene stimulation), located on the surface of the uterus and ovaries.