Key Point: Differences attributed to multiple late-term ultrasounds disappeared by age 8.

Effects of Repeated Prenatal Ultrasound Examinations on Childhood Outcome Up to 8 Years of Age: Follow-Up of a Randomised Controlled Trial


Newnham JP, Doherty DA, Kendall GE, Zubrick SR, Landau LL, Stanley FJ. Lancet. 2004 Dec 4-10;364(9450):2038-44.

Interpretation: Exposure to multiple prenatal ultrasound examinations from 18 weeks’ gestation onwards might be associated with a small effect on fetal growth but is followed in childhood by growth and measures of developmental outcome similar to those in children who had received a single prenatal scan.