Gynaecology & Obstetrics General 5ff338cd The finding of a single umbilical artery on ultrasound is A An Indicator of considerably increased incidence of major malformations in the fetus B Occurs in 10% of newborns C Insignificant D Equally common in newborn of diabetic and nondiabetic mothers High-Yield Explanation The presence of a single umbilical artery may be associated with congenital malformations.