Pregnant women must know how to accurately calculate the due date of pregnancy
The expected date of delivery (EDD) of pregnancy is one of the biggest concerns for all expectant mothers. However, every pregnant woman’s physiological condition is different, so calculating the due date of pregnancy needs to be individualized. The following will give you a detailed introduction to the methods that pregnant women must know to calculate the due date of pregnancy.
1. Last menstrual period method
The last menstrual period method is the most commonly used method for calculating the due date of pregnancy and is generally widely accepted by doctors and pregnant women. According to this method, you need to know the first day of your last menstrual period and add 280 days to that. This 280 days represents an average pregnancy, which is 37 weeks or 9 months, 1 week plus 5 days. Of course, you can also use an online pregnancy due date calculator to calculate this.
However, the last menstrual period method does not apply to all pregnant women. This method may be less accurate if your menstrual cycle is shorter, or if you\’re not sure when your last period was.
2. B-ultrasound method
In addition to the last menstrual period method, pregnant women can also use the B-ultrasound method to calculate the expected date of pregnancy. Pregnant women often undergo B-ultrasound examinations because B-ultrasound can not only determine whether the child is developing normally, but also provide a more accurate due date of pregnancy. The B-ultrasound method makes calculations and predictions based on the child\’s size and developmental stage.
During the B-ultrasound examination, the doctor will measure the fetus\’ head circumference, abdominal circumference, femur length, etc. Based on these measurements, doctors can determine the size of the baby and the due date. In addition, the first B-ultrasound examination is usually performed between the 7th and 12th weeks of pregnancy. Therefore, an accurate due date can be obtained in the early stages of the child\’s life.
3. Calculation method based on ovulation date
The ovulation date-based calculation method is a method of calculating the expected date of delivery based on the pregnant woman\’s ovulation date. Normally, ovulation occurs on the 14th day of the menstrual cycle. Therefore, if you are able to determine your ovulation date, you can add 280 days to your ovulation date to get your due date.
You can determine your ovulation date by taking your temperature, checking ovulation test strips, or using an ovulation tracker. Although the calculation method based on ovulation date is more accurate, errors may still occur.
4. Comprehensive calculation method
The comprehensive calculation method is a calculation method that combines multiple methods and uses multiple calculation methods to comprehensively calculate the expected date of pregnancy. In order to improve the accuracy of calculation, the last menstrual period method, calculation method based on ovulation date and B-ultrasound method can be combined. The accuracy of calculations can be maximized using a comprehensive calculation method.
Conclusion: Different prediction methods may be more accurate for different pregnant women. When calculating the expected date of pregnancy, multiple methods should be used for comprehensive calculations to obtain more accurate prediction results.
