The fetal stool of a newborn baby will be expelled within three days after birth, because the newborn baby will slowly appear to pass fetal stool after 10 hours after birth. However, there is a process of fetal defecation that can last 1-2 days, and the child’s fetal stool will be expelled within three days after birth. Since the bowel movement of each newborn is different, some children may take up to a week to be completely eliminated. If the fetal stool is not expelled in time, the child should be examined in time to rule out congenital megacolon and intestinal malformations to prevent the delayed expulsion of fetal stool due to surgical reasons, so as not to affect the growth and development of the child.