Pregnancy period calculation method:
The basic method for calculating pregnancy period is to start from the first day of the last menstrual period and calculate back about 280 days to predict the expected date of delivery. If you are unsure of the time of your last menstrual period, you can use an ultrasound to determine the size and development of the fetus to calculate the expected date of delivery.
Method 1: Last menstrual period method
The last menstrual period method is the most commonly used method of calculating pregnancy period. First, remember the start date of your last menstrual period, then use the period method to calculate your average cycle length, and then subtract the average cycle length from one year to get your average total number of menstruation in a year, and then Through calculation, you can know your due date. It should be noted that the last menstrual period method is only suitable for women with regular menstrual cycles.
Method 2: B-ultrasound prediction method
The B-ultrasound prediction method is to determine the size and development status of the fetus through B-ultrasound examination, thereby calculating the expected date of delivery. B-ultrasound examination is usually performed around 12 weeks of pregnancy to determine the size and development of the fetus and calculate the expected date of delivery. The B-ultrasound prediction method is suitable for women with irregular menstrual cycles or whose last menstrual period cannot be determined.
Method 3: Ovulation method
The Ovulation method calculates the expected date of delivery by analyzing the time of ovulation. Ovulation is the period of time when eggs are released from the ovaries and ready for fertilization. Under normal circumstances, ovulation occurs about 14 days before menstruation begins. Therefore, if you determine the time of ovulation, you can calculate the expected date of delivery.
Method 4: Late B-ultrasound examination
The late B-ultrasound examination method is to determine the size and development status of the fetus through B-ultrasound examination in the later stages of pregnancy, thereby calculating the expected date of delivery. Usually, a B-ultrasound examination is performed around 28 weeks of pregnancy to determine the size and development of the fetus and calculate the expected date of delivery.
Accurately predict the arrival time of the baby:
The due date can be determined through the above methods, but the arrival time of the baby is also affected by many factors. Such as fetal size, placental condition, mode of delivery, etc. But at the end of pregnancy, all indicators tend to be stable, and the baby\’s arrival time is relatively certain.
Normal delivery time
Normal delivery time is the time from the opening of the cervix to the birth of the baby, usually within 6-24 hours. If the baby is not delivered within this time, a doctor will need to monitor the labor process.
Labor monitoring
Labor monitoring means that doctors monitor and analyze the labor process based on factors such as the degree of uterine contractions, opening of the cervix, fetal heart rate, etc. Labor monitoring can effectively determine the arrival time of the baby.
Fetal size and placental condition
Fetal size and placental condition are one of the important factors that determine when the baby will arrive. If the baby is too large or the placenta is aged, it may cause difficulty in delivery and require a cesarean section.
Summary:
Pregnancy calculation methods include last menstrual period method, B-ultrasound prediction method, Ovulation method and late B-ultrasound examination method. byThe above method can determine the expected date of delivery. But the arrival time of your baby is affected by many factors. At the end of pregnancy, various indicators tend to stabilize, and normal delivery time is completed within 6-24 hours. Labor monitoring can effectively determine the arrival time of the baby. The size of the fetus and the condition of the placenta are important factors that affect the time of the baby\’s arrival.
