Fetus larger than the actual gestational week may be related to too much nutrition intake by pregnant women, combined gestational diabetes mellitus, means of measurement and other reasons, which need to be specifically analyzed. 1. Pregnant women consume too much nutrition: during pregnancy, because pregnant women consume too much nutrition, the fetus’s nutrient absorption is very sufficient, resulting in rapid growth and development of the fetus, the phenomenon of larger than the actual gestational weeks. 2. Gestational diabetes: If the pregnant woman is combined with gestational diabetes, and the blood sugar control is not good, the high blood sugar will pass through the placenta into the fetus, stimulating the fetus to grow too fast, causing the fetus to be bigger than the actual gestational week. 3. Measurement methods: Since the doctors’ measurement methods are all estimates, no matter ultrasound or according to the uterine height and abdominal circumference, there are errors, and the measured fetal size may not be consistent with the real situation. If the fetus is larger than the actual gestational week after several measurements, you should communicate with your supervising doctor in time to clarify the cause of the oversized fetus and then treat the symptoms.