A small fetus does not necessarily require early termination of pregnancy, but depends on whether the fetus can continue to expect treatment, and if it is no longer suitable to remain in the uterus, early termination of pregnancy is required. The first step is to determine by ultrasound whether the fetus meets the criteria for fetal growth restriction, i.e., fetal weight or abdominal circumference is less than the 10th percentile of the normal value for the same gestational week. If the criteria for fetal growth restriction are met, the cause of the condition should be actively investigated and appropriate management measures should be taken according to the cause of the condition. If it is caused by the mother’s pregnancy comorbidities, treat the mother’s comorbidities first. If it is caused by fetal malformations, consider terminating the pregnancy. If it is caused by abnormalities of the placenta or the umbilical cord, closely monitor the condition of the fetus If the fetus suffers from hypoxia in the uterus or the fetus continues to be underdeveloped in the uterus or if there is an exacerbation of any other pregnancy comorbidities, the pregnancy may have to be terminated prematurely. If the fetus is small, it is recommended to consult a doctor to find out the cause of the problem and take appropriate treatment measures, and to choose to continue the pregnancy or terminate the pregnancy under the doctor’s advice according to the treatment.