Umbilical Cord Blood Stem Cells upto 180Ml of blood from a newborn baby that us returned to the neonatal circulation if the Umbilical Cord is not prematurely clamped.
In some obstetric and midwifery practices, physiological extended-delayed cord clamping protocol, as well as water birth, allows for the cord blood to pulse into the neonate for 2 - 20 minutes after delivery.
If the umbilical cord is not clamped, a physiological clamping occurs upon interaction with cold air, when the internal gekatinous substance, called Wharton's jelly, swells around the umbilical artery and veins.
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