How to accurately calculate the safety period In fact, women have their own safety period.
It stands to reason that the safety period is a day without fertilization conditions. It should be safe to have sex during the safety period, but many people have eaten it? Safety period? The key problem lies in the calculation of safety period. Every adult woman has her own menstrual cycle, and no two people are exactly the same, so everyone has their own safety period, right? Top seven and bottom eight? Or? Top three and bottom four? Not everyone is like this.
How to calculate the safety period
1. time method: menstrual cycle is from the first day of this menstrual cycle to the day before the next menstrual cramp. Ovulation generally occurs in the middle of menstrual cycle, with 28 days as a cycle, and the ovulation period should be about 14 days before the next menstrual cycle. In theory, it is easy to get pregnant two or three days before and after ovulation, and the rest of the time is considered a safe period.
2. body temperature method: within one or two days after ovulation, the body temperature begins to rise, which is about 0.2 higher than that before ovulation? 0.4℃, so it is also helpful to measure the body temperature before getting up every morning to calculate the safety period.
3. Billings method: Generally, when a large amount of lubricating mucus appears in adult women, it is close to ovulation. At this time, vaginal secretions are clearer, and filaments can be pulled out, which is not easy to break. Vaginal secretion in safe period is small and thick, which is easy to break when pulling.
When is the safety period? Except the menstrual period and ovulation period, the rest of the time is a safe period for women. Generally speaking, if women take 28 days as the normal physiological cycle, then the first seven days and the last eight days of menstrual cramps are the safe period. For women with irregular menstrual cycles, this method is not desirable.
Women's safety period is mainly calculated according to ovulation period and menstrual cycle. In addition to the calendar method, the safety period can also be calculated by basic body temperature measurement and secretion observation. Combining the above three methods to calculate the safety period can improve the accuracy. It is worth noting that the safety period is not absolutely safe. Sometimes women will ovulate early or late, and the judgment of safe period will become invalid.
Except the menstrual period and ovulation period, the rest of the time is a safe period. Women's safety period is divided into pre-ovulation safety period and post-ovulation safety period. The period from the day when menstruation is clean to the day before ovulation is the safe period before ovulation. The safe period after ovulation is from the first day after ovulation to the day before the next menstrual cramp.
The ovulation period of women is generally about 14 days before the next menstrual cramp. To be on the safe side, we call the first 5 days and the last 4 days of ovulation day, including ovulation day, 10 days as ovulation period. Generally speaking, women of normal childbearing age only ovulate one egg per month. Eggs can survive for 1-2 days after ovulation, and sperm can survive for 2-3 days in female reproductive tract. Fertilization ability is mostly within 24 hours after ovulation. After 2-3 days, sperm will lose the ability to combine with eggs. So you have sex 2-3 days before ovulation, and you may get pregnant 1-2 days after ovulation. This period is called easy pregnancy or dangerous period.
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