mthfr two umbilical arteries vs three
Most babiesâ umbilical cords have three blood vessels: one vein, which brings nutrients from the placenta to baby, and two arteries that bring waste back to the placenta.But a two-vessel cord has just one vein and one artery â that's why the condition is also referred to as having a single umbilical artery.ost babiesâ umbilical cords have three blood vessels: one vein, which brings nutrients from the placenta to baby, and two arteries that bring waste back to the placenta.