"placental transfusion" refers to the transfer of blood from the mother to the baby through the placenta after birth. This process helps provide the baby with important nutrients and oxygen that it needs for a healthy start in life. Full definition
Considering what we know about placental transfusion immediately after birth, and the importance of adequate blood volume for newborns, it would be unethical to randomly allocate newborns to have premature clamping of their cords (and many mother's would refuse consent). (midwifethinking.com)
While the cord is pulsating, placental transfusion is supplying the baby with oxygen, nutrients and an increased blood volume to support the transition to life outside the womb. (checkpregnancy.com)