Figure 1From: Inter- and intra-observer variability in Sonographic measurements of the cross-sectional diameters and area of the umbilical cord and its vessels during pregnancy Ultrasonographic measurement A. of the cross-sectional area of the umbilical cord (C), the diameter of the umbilical vein (V) and the umbilical artery (A); and B. of the longitudinal section of the umbilical cord (between 12 and 14 weeks).Back to article page