Fetal intestinal dilatation, whether it is terrible or not needs to be analyzed according to the specific situation. Fetal intestinal dilatation is mostly physiological intestinal dilatation is a normal physiological phenomenon, not terrible, but there are a small number of pathologic intestinal dilatation, may be the emergence of intestinal atresia, megacolon, and intestinal obstruction, and so on, relatively serious, and need to abide by the doctor’s instructions for standardized treatment. 1. Physiological intestinal dilatation: it is commonly induced by excessive localized accumulation of gas in the intestinal canal or meconium, which is a normal phenomenon. 2. Pathological intestinal dilatation: commonly caused by intestinal developmental abnormalities, such as intestinal atresia, megacolon and intestinal obstruction, which are more serious and need to be treated actively. Pathological intestinal dilatation may seriously affect the growth and development of the fetus, so it is recommended that pregnant women regularly and actively undergo obstetric examination, and if fetal intestinal dilatation is observed, the obstetrician needs to decide whether treatment is needed.