There are several reasons why the fetus is larger than the actual gestational week: 1) the pregnant woman is rich in nutrition during pregnancy, and the fetus is rich in nutrient absorption, which will lead to a larger fetus than the actual gestational week, which is a normal phenomenon; 2) the doctor’s measurement method will also affect the size of the fetus, as the doctor’s measurement angle or method is different, there will be certain data differences; 3) the position of the fetus in the abdomen will also The size of the fetus can be affected by the different positions of the fetus, and the data measured by different doctors will be different; 4. Genetic factors may also cause the fetus to be larger than the actual gestational week. Under normal circumstances, it is normal for the fetus to be about 1 week larger than the actual gestational week, and pregnant women do not need to be overly nervous, nor do they need to deliberately control their diet.