During pregnancy, women need to go to the hospital for multiple prenatal check ups and schedule them according to different gestational weeks. B-ultrasound is a commonly used prenatal examination method, and this examination can also predict and estimate a woman's expected delivery date in the future. So, is the due date on the ultrasound scan accurate?
1. After 35 days of pregnancy, women need to go to the hospital for the first prenatal examination in the early stages of pregnancy. At this time, B-ultrasound can be used to observe the development of a round or oval gestational sac in the uterine cavity, which can rule out ectopic pregnancy. At the same time, B-ultrasound can also be used to calculate the expected delivery date in the future. Moreover, the estimated due date by ultrasound is relatively accurate, with a theoretical error of only 1-2 weeks of gestation.
2. However, there are individual differences in pregnancy for each woman, so there may be significant differences between the expected delivery date displayed on the ultrasound and the actual date of labor. Because women are considered full-term after 37 weeks of pregnancy, and the due date is usually calculated based on 40 weeks of pregnancy, women who are pregnant at full term may sometimes be affected by various factors and may give birth before the due date. However, some women may miss the due date without experiencing uterine contractions.
3. However, in summary, women approaching their due date need to pay extra attention, especially when they experience regular abdominal pain and contractions. Some women may not even have contractions, but they may experience signs of labor such as water breakthrough or redness. They must be highly vigilant and should go to the hospital for examination as soon as possible to prevent pregnancy accidents.
