When to choose to have a fetal ductus arteriosus ligation is a difficult choice for many mothers, too small for fear of the surgical risks to their baby, too large for fear of the impact on development. So how do the experts explain it? According to the latest clinical study (Journal of Pediatrics) delayed or no ligation of patent ductus arteriosus (PDA) in ligated newborns can lead to better outcomes. Dr. Ronald Clyman of the University of California concluded from a study of the management of ductus arteriosus in a group of neonates that by applying indomethacin to one group of neonates, surgical ligation was performed only in those who met specific criteria. 50% of the children treated with indomethacin closed on their own. Moreover, the incidence of ligation and necrotizing small bowel colitis was reduced. Of course, this data only shows that some newborns treated with indomethacin can facilitate closure, but experts still recommend that children should go to the hospital for a regular cardiac ultrasound and choose a treatment plan based on the size and condition of the catheter.