The reason why the ductus arteriosus or foramen ovale of the heart does not close in newborns is mainly because the pathways of blood circulation are different in the fetal and neonatal periods. In the fetal period, the pulmonary circulation is predominant, and the ductus arteriosus and foramen ovale of the interatrial septum are open at this time, while after birth, that is, in the newborn, the body circulation is predominant. When the pressure of the body circulation exceeds the pressure of the pulmonary circulation, there is a closure of the ductus arteriosus and foramen ovale. Therefore, in the early neonatal period, many children may have an unclosed atrial septum foramen ovale and an unclosed ductus arteriosus, which generally close gradually with age. If they do not close after a period of time after birth and do not affect the normal activities of the child or the growth and development of the child, and the child does not show any abnormalities, the child can continue to be observed, and the heart ultrasound is usually repeated at the age of half a year, one year and one and a half years after birth, and if these valves are closed, there is no problem. If they do not close, you need to see a pediatric surgeon or cardiac surgeon to determine if surgery is needed.