DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Umbilical cord blood clot. Dark clotted blood in the umbilical cord of a newborn baby. The blood clot (thrombosis) can block the flow of blood, which can deprive the baby of oxygen during birth. If the delivery is successful, the clot can be removed surgically.
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