Arterial ductus arteriosus in newborns usually closes within 1 year, and if the ductus arteriosus is not closed after 1 year, surgical treatment is required. The ductus arteriosus is a physiologic blood flow pathway that connects the isthmus of the aorta to the root of the left pulmonary artery during fetal life. After birth, due to the decrease in pulmonary artery resistance, the significant decrease in prostaglandin content and the increase in partial pressure of oxygen in the blood, about 85% of infants have their arterial ducts closed as arterial ligaments within the first 2 months of life, and those who fail to do so after the overdue period of time are considered to have unclosed arterial ducts. Neonatal arterial conduit is an important channel for the fetal heart to secure blood circulation. Newborns may have ductus arteriosus after birth, and most of them will close on their own within a few months or a year. When neonatal arterial ductus arteriosus occurs, you need to pay close attention to your baby’s breathing, and send him or her to the doctor for treatment in case of oxygen deprivation such as breathlessness and cyanosis. If the ductus arteriosus does not close by the age of 1 year, the probability of spontaneous closure is very low, and surgical intervention is needed as soon as possible.