True about umbilical cord
Right umbilical vein regresses and left umbilical vein is left, umbilical cord has two umbilical aeries and the left umbilical vein. An average umbilical cord is 55cm long with a diameter of 1-2 cm and 11helices Ref: Gray's 39e/p-210-220
Contains 2 umbilcal veins
Contains 1 umbilical aery
Right umbilical vein disappear
Length is 25 - 30 cms
General anatomy