10/21/2026
Umbilical cord blood is simply a location that is part of the baby’s circulatory system, much like “inferior vena cava blood” or “ascending aortic blood”.
Before the baby is born, fetal circulation includes the placenta for nutrient and gas exchange. After the baby is born, there is a transition period (if left undisturbed and un-clamped) where blood that is circulating through the placenta is shunted to the baby before the cord physiologically closes on its own. This ensures the baby is still receiving oxygen and nutrients as they transition to neonatal circulation with their full complement of their own blood.
Early cord clamping interrupts this physiological process. It’s known to increase neonatal death due to low blood volume as well as increase neurological challenges in the child due to reduced ferritin needed for normal development.
What it does is leave the baby’s own blood sitting in the placenta and within the umbilical cord that was not allowed to reach the baby. Calling this “umbilical cord blood” implies it belongs to the cord and is available for harvesting rather than belonging to the baby for their optimal development.
A change in language would be a start in recognizing that neonatal blood, which is rich in stem cells, belongs in the baby for a reason. Harvesting this blood should come with an acknowledgment that the baby may be compromised by this blood loss. Continuing to call this “umbilical cord blood” reinforces the misconception that the blood has no value to the baby, is extraneous, and is available for others’ uses and intentions.
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