In chronological order of appearance, they are named postcardinal, subcardinal, and supracardinal veins.
The postcardinal veins will atrophy after the anastomoses are established.
Function of Inferior vena cava is initially carried by right and left postcardinal
Progressive changes in the abdomen lead to replacement of the postcardinal
veins by the subcardinal and supracardinal veins.
Persistence of the right postcardinal vein with regression of the supracardinal vein results in the well-known anomaly Retrocaval ureter (1).
In this patient, neither the right postcardinal vein nor the supracardinal vein persisted.
The authors suggest the explanation for this varying pattern based on this step of the embryological development of the right renal vein: There was an error on the fusion of the branches to the dorsal mesonephros derived from the right postcardinal
vein, the dorsal-medial branches of the right supracardinal vein and the ventral branches of the right subcardinal vein (the latter represented by the IRRV, marked by the presence of its gonadal tributary (Gillot).
In particular, the postcardinal
veins appear and remain in the pelvis as the common iliac veins, the right supracardinal vein persists to form the infrarenal IVC, and the right subcardinal vein persists to develop into the suprarenal segment by formation of the subcardinal-hepatic anastomosis while the left subcardinal vein and the left supracardinal vein regress completely [2, 4, 6].