Significance At birth, newborns must switch from the fetal aquatic life to the aerial one, by closure of a vessel named the ductus arteriosus. During fetal life, it allows blood to bypass the lungs, and a failure of its closure at birth is a major cause of mortality, particularly in preterm neonates. This pathological condition is known as patent ductus arteriosus and occurs in approximately 60% of preterm infants born before 28 wk of gestation. Herein, we show, for the first time to our knowledge, the involvement of two circulating growth factors, bone morphogenetic proteins BMP9 and BMP10, in the anatomical closure of this vessel. This finding will have potential clinical applications in the management of this pathology.