Gordon Z, Elad D, Almog R, Hazan Y, Jaffa A, Eytan O. Anthropometry of fetal vasculature in the chorionic plate. J Anat. 2007;211:698-706 pubmed
..The more marginal the umbilical cord insertion is on the chorionic plate, the more monopodial branching patterns are created to compensate the dichotomous pattern deficiency to perfuse peripheral placental territories. ..