Why doesn't pregnancy start from sexual intercourse?

We all know that pregnancy is calculated from the first day of the last menstrual period. During the ovulation period, the two parties have sexual intercourse, and the male sperm and egg cell fuse to produce sperm and egg combination, and the woman may become pregnant. So why is pregnancy not counted from sexual intercourse? Next, follow my steps and learn about it together!

Why is pregnancy not counted from sexual intercourse?

In medicine, the number of days of pregnancy is calculated from the expected date of delivery. All medical indicators have clear requirements, and the number of days of pregnancy is calculated from the expected date of delivery. Since the regular changes in the uterine wall are the cause of the physiological cycle, the uterine wall can only grow and develop to a certain level before the pregnant egg embryo can implant, and only after the pregnant egg embryo implants can a test tube embryo be produced. Because sexual intercourse does not necessarily belong to the ovulation period, and sperm and egg fusion does not necessarily occur on the same day, it is not clear when the sperm and egg fusion occurs. The length of each person's menstrual cycle is different, so the time of ovulation is naturally not unified.

Therefore, it is more convenient to calculate according to the expected date of delivery. Hello, the calculation of pregnancy period is based on the expected date of delivery, which is more convenient. The delivery date is also calculated in this way. From the first day of menarche every month, a new menstrual cycle begins, so the number of weeks of pregnancy should be calculated according to the menstrual cycle. Folic acid tablets should be supplemented immediately during the first three months of pregnancy to avoid the possibility of neural tube defects in the fetus. Immediately supplement comprehensive and balanced nutrients to meet the needs of fetal growth. At the same time, you should pay attention to going to the hospital regularly for prenatal check-ups to check the development of the fetus and make appropriate adjustments.

How to calculate pregnancy cycle

In medicine, the number of days of pregnancy is counted from the first day of your due date, not from the time of intercourse. In fact, the entire 40 weeks of pregnancy include the two weeks of preparation for pregnancy, that is, the period from the due date of pregnancy to the ovulation period. Although the baby is not actually conceived, it is also counted in the pregnancy days. In clinical medicine, the day when the egg cell begins to be produced is considered the first day of pregnancy. The first day of the menstrual period is when the egg cells begin to grow. From this day on, the 40th week of pregnancy, or 280 days, is an October pregnancy. The recognized optimization algorithm for counting weeks of pregnancy is based on the first day of the expected date of delivery. It is easy to calculate. The actual number of weeks of pregnancy is half a month later than this because the ovulation period is half a month later. It depends on when you have sex. If there is no ovulation period, it is difficult to get pregnant, so it is not easy to use this method to calculate. If a pregnant woman lacks folic acid and vitamins, the risk of neural tube defects in the fetus will immediately increase. Therefore, pregnant women should eat more vegetables and fresh fruits, and take appropriate supplements of folic acid tablets and various nutrients.