The fetal abdominal circumference is larger than the head circumference is normal, need to be based on the pregnancy situation, the head and abdominal circumference is within the normal range of comprehensive judgment, can not be generalized. In the middle and late stages of pregnancy, there is generally a small difference between abdominal circumference and abdominal circumference or abdominal circumference is slightly larger than head circumference, as long as the head circumference and abdominal circumference are within the normal range, indicating that the fetus is developing well in utero, pregnant women can regularly maternity check, no need to worry excessively. When the abdominal circumference is greater than the head circumference in early pregnancy, or the head circumference is too small and the abdominal circumference is too large during pregnancy, you need to be alert to fetal malformations and abnormal development. A small head circumference may indicate malnutrition, brain or skull malformation, while a large abdominal circumference may present with ascites, abdominal cleft, abdominal organ malformation, etc. It is usually associated with radiation exposure, drug factors, poor quality of fertilized eggs, etc. Further comprehensive analysis based on fetal ultrasound and amniocentesis results can be performed to assess the specific fetal situation and determine whether treatment can be continued during pregnancy or treated after birth. Fetuses with incurable or organ malformations are recommended to terminate the pregnancy promptly. Pregnant women should strengthen dietary management during pregnancy, pay attention to balanced nutrition, take appropriate folic acid supplements, and stay away from risk factors with teratogenic potential to ensure healthy fetal development.