Background introduction
The number of days pregnant is a matter of great concern to pregnant women and doctors. In the past, days to pregnancy were usually calculated by predicting the start of your last menstrual period. However, this method is not accurate because some women may have irregular menstrual cycles. Now, ultrasound abdominal examination (B-ultrasound) has become the best choice for measuring the number of days of pregnancy. B-ultrasound can not only determine whether pregnancy has occurred, but also determine the pregnancy cycle and expected date of delivery. The following will introduce in detail how to use B-ultrasound to calculate the accurate number of days of pregnancy.
Step one: Confirm pregnancy cycle
B-ultrasound examination can determine the pregnancy cycle and thus calculate the number of days of pregnancy. Under normal circumstances, B-ultrasound is performed after 6 weeks of pregnancy, because at this time the fetus is large enough to accurately measure the head diameter and femur length. These measurements will be used to calculate your due date and days into pregnancy.
In addition, the doctor will also observe whether the fetus has any development problems, such as ectopic pregnancy, abnormal placenta, etc. If any problems are present, further testing and treatment will be required.
Step 2: Determine the expected date of delivery
Another use of B-ultrasound examination is to determine the expected date of delivery. The expected date of delivery refers to the approximate date of birth of the fetus, usually calculated from the first day of the last menstrual period, plus 280 days. However, this prediction was not accurate. Through B-ultrasound examination, doctors can confirm the expected date of delivery more accurately. The due date is a key factor in calculating the number of days of pregnancy because it determines the size and development of the fetus and can be used to deduce the length of pregnancy.
Step 3: Calculate gestational age
Gestational age is another way of representing the number of days in pregnancy. Gestational age is usually calculated from the first day of the last menstrual period, and each week is 7 days. For example, if the first day of your last period was March 1st and today is May 1st, your gestational age is nine weeks (5 weeks + 4 weeks). This calculation method is relatively simple, but it is not very accurate, especially for women with irregular menstrual cycles, so B-ultrasound examination is a better choice.
Step 4: Pay attention to the difference between gestational age and gestational age
Finally, you need to pay attention to the difference between gestational age and gestational days. Gestational age is measured in weeks, while gestational age is measured in days. The number of gestational weeks multiplied by 7 can be used to obtain the corresponding number of gestational days, but dividing the number of gestational days by 7 does not always accurately convert to gestational weeks. Because gestational age is calculated in complete weeks, rounding is required during the conversion process to obtain accurate results.
Summary
Through B-ultrasound examination, you can get more accurate information about your pregnancy cycle, due date, gestational age and gestational days. This information is very important for pregnant women and doctors because it can determine the size and development of the fetus in order to prepare for delivery in advance and pay attention to the health of mother and baby. If you are pregnant, we hope this article is helpful.
