巨膀胱-小结肠-The etiology of the syndrome of poor intestinal peristalsis is not yet clear, and it may be related to environmental factors, genetic factors, dietary factors, and emotional and nutritional factors during pregnancy. The pathogenesis of the disease is not detailed, and some scholars believe it is due to the loss of nerve fiber control over intestinal cells, which is a neurogenic poor peristalsis. Some scholars also believe it is related to usual dietary habits and chromosomal abnormalities, but this has not been confirmed yet.