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The morphometry of the placental vessels was studied on a number of 51 normal term placentas, using plastic injection (Technovit 7143), followed by sodium hydroxide corrosion. In 51 cases, we found the diameter of the umbilical vein between 6.2-10.5 mm, most commonly, in 54.90% of cases, finding it between 8.0-8.6 mm. The trunk of the umbilical vein arised from a number of 2-4 branches, most commonly, in 41.18% of cases, being made of 2 branches. We observed the umbilical arteries on a number of 42 cases. The diameter of the umbilical artery 1, was between 2.5-6.0 mm, most frequently, in 45.24% of cases, having a diameter between 4.0-4.9 mm. The ratio between the diameter of the umbilical artery 1 and the diameter of the corresponding venous trunk was most commonly between 50.0-58.82%. The diameter of the umbilical artery 2, was between 3.0-8.5 mm, most frequently, in 53.66% of cases, having a diameter between 4.0-4.8 mm. The ratio between the diameter of the umbilical artery 2 and the diameter of the corresponding venous trunk, was most commonly between 40.0-46.51%, in one case, the diameter of the umbilical artery 2 was equal to the diameter of the venous trunk. Comparing the diameters of the two umbilical arteries on 41 placentas, we found in 56.10% of cases, the diameter of the umbilical artery 2 was larger then the diameter of the umbilical artery 1 by 0.2-2.5 mm and in 39.02% of cases, the diameter of the umbilical artery 1 was larger then the diameter of the umbilical artery 2 by 0.1-0.9 mm. In 8.20% of cases the umbilical arteries had the same diameter.

The morphometry of the placental vessels was studied on a number of 51 normal term placentas, using plastic injection (Technovit 7143), followed by sodium hydroxide corrosion. In 51 cases, we found the diameter of the umbilical vein between 6.2-10.5 mm, most commonly, in 54.90% of cases, finding it between 8.0-8.6 mm. The trunk of the umbilical vein arised from a number of 2-4 branches, most commonly, in 41.18% of cases, being made of 2 branches. We observed the umbilical arteries on a number of 42 cases. The diameter of the umbilical artery 1, was between 2.5-6.0 mm, most frequently, in 45.24% of cases, having a diameter between 4.0-4.9 mm. The ratio between the diameter of the umbilical artery 1 and the diameter of the corresponding venous trunk was most commonly between 50.0-58.82%. The diameter of the umbilical artery 2, was between 3.0-8.5 mm, most frequently, in 53.66% of cases, having a diameter between 4.0-4.8 mm. The ratio between the diameter of the umbilical artery 2 and the diameter of the corresponding venous trunk, was most commonly between 40.0-46.51%, in one case, the diameter of the umbilical artery 2 was equal to the diameter of the venous trunk. Comparing the diameters of the two umbilical arteries on 41 placentas, we found in 56.10% of cases, the diameter of the umbilical artery 2 was larger then the diameter of the umbilical artery 1 by 0.2-2.5 mm and in 39.02% of cases, the diameter of the umbilical artery 1 was larger then the diameter of the umbilical artery 2 by 0.1-0.9 mm. In 8.20% of cases the umbilical arteries had the same diameter. Keywords: placental, vessels, morphometry

The formation level of the inferior vena cava in the vertebral column was found to be at the level of L3 -L4 and L5 - S1, with differences between genders. The total length of the inferior vena cava ranged between 187.10 and 278.3 mm. Interiliac angle measured 48.40 and 85.80o. The length of the IVC from its formation point up to the termination of the right renal vein in the IVC ranged between 78.50 and 135.0mm, and the length of the IVC from its formation point to the termination of the left renal vein into the IVC ranged between 89.80 and 119.0mm. The length of the IVC from its formation up to the termination of the hepatic veins ranged between 197.20 and 263.70mm. The diameter of IVC at the point of its formation ranged between 18.0 and 26.20 mm, at the level of the right infrarenal level ranged between 20.10 and 28.70 mm, in 78.08% of the cases. In female cases, the diameter ranged between 18.06 and 25.69 mm, the diameter of the IVC at the level of the right suprarenal ranged between 19.82 and 31.09mm, the diameter at the level of the left infrarenal ranged between 18.59 and 32.49mm, at the level of the left suprarenal vein ranged between 19.10 and 33,80 mm, the diameter at the intrahepatic level ranged between 20.30 and 33.40mm, and the diameter of the IVC at the suprahepatic level ranged between 23.10 and 37.0mm.