Small size-specific umbilical vein diameter in severe growth restricted fetuses that die in utero.

Background: To study changes in umbilical vein (UV) blood flow velocity, diameter and blood flow volume in intrauterine growth retardation (IUGR) fetuses who die in utero (IUD-IUGR).

Methods: Twelve singleton IUGR fetuses who died in utero below 600 g were included. All cases had abnormal uterine and umbilical arteries PI.