Version July 2025
Three-dimensional angiosonogram demonstrating the umbilical vessels in a free loop of the cord.
(Panel A) Normal three-vessel cord. Two arteries (A) are looping around the vein (V).
(Panel B) Two vessels in a relatively straight umbilical cord. One artery and one vein are seen in the axial and longitudinal views.
(Panel C) Two vessels are seen in a hypercoiled umbilical cord. The single artery and vein are looping around each other.