Abnormality of umbilical vein blood flow 2011-01-16T04:15:43Z UMLS:C4023631 Umbilical vein blood flow (UVBF) is closely related to the mass of placental cotyledons and is considered an expression of the amount of oxygen and nutrients transferred from the mother to the fetus. HP:0010949 A first-trimester prenatal ultrasound finding of abnormal blood flow in the umbilical vein. Abnormal umbilical blood flow measurement