Ultrasound shows gestational age is one week smaller than the actual age

We all know that gestational age is the time we are pregnant, and we will also have a due date. The delivery date is calculated by the doctor based on the first day of our last menstrual period. The number of weeks of pregnancy is from the first day of the last menstrual period to the delivery date. Of course, if the menstrual period is wrong, the delivery date and gestational age will be inaccurate, so these are all reference data only, not specific data.

When we go to the hospital for a pregnancy check-up, the ultrasound report will also show the baby's gestational age. So are these two gestational ages the same? Is the gestational age on the ultrasound accurate? In fact, we can tell how our baby is developing by comparing the two gestational ages. These two weeks of pregnancy are different. By comparing the two weeks of pregnancy, we can tell whether the baby is developing normally and how fast he is growing. Is it normal that the ultrasound shows that the pregnancy week is one week less than the actual number?

If the ultrasound shows that the pregnancy week is larger than the actual pregnancy week, there are only two possibilities: either you have misunderstood the time of your last menstrual period, or the fetus has not absorbed enough nutrients and is too large. If the ultrasound shows that the gestational age is smaller than the actual gestational age, there are also two possibilities. Either you have made a mistake in the time, or the fetus is too small and the nutrient supply and demand of the fetus is not balanced, resulting in incomplete development of the fetus and a small fetus. Therefore, the gestational age displayed on the ultrasound is closely related to the actual gestational age of the fetus.

We all know that under normal circumstances, the pregnancy weeks on B-ultrasound are accurate, and the growth and development of the fetus are normal. In other words, when the actual pregnancy weeks are consistent with the pregnancy weeks on B-ultrasound, or are only about one week apart, then the pregnancy weeks shown on B-ultrasound are one week less than the actual ones, which is also normal. In the medical field, a week's delay is normal. Only when the actual pregnancy week is much different from the pregnancy week indicated by B-ultrasound, we will consider which of the two pregnancy weeks is accurate and which is not.

Therefore, it is normal for the ultrasound to show that the pregnancy week is one week less than the actual week. Because the growth and development conditions and digestion and absorption conditions of the fetus are different, good or poor digestion and absorption can affect the number of weeks of pregnancy. Generally speaking, the actual pregnancy rate is correct, unless you have made a mistake in your menstrual period time, otherwise the actual pregnancy week is correct. If the gestational age on B-ultrasound is consistent with the actual gestational age, then the gestational age on B-ultrasound is accurate. However, if the gestational age on B-ultrasound is inconsistent with the actual gestational age, then the fetus may be too large or too small, and the gestational age on B-ultrasound is incorrect. In fact, deviations within a week are all allowed.