Jessica L Gleason, Mary L Hediger, Zhen Chen, Jagteshwar Grewal, Roger Newman, William A Grobman, John Owen, Katherine L Grantz
OBJECTIVE: Error in birthweight prediction by sonographic estimated fetal weight (EFW) has clinical implications, such as avoidable cesarean or misclassification of fetal risk in labor. We aimed to evaluate optimal timing of ultrasound and which fetal measurements contribute to error in fetal ultrasound estimations of birth size at the extremes of birthweight. STUDY DESIGN: We compared differences in head circumference (HC), abdominal circumference (AC), femur length (FL), and EFW between ultrasound and corresponding birth measurements within 14 (n=1290) and 7 (n=617) days of birth for small (SGA, <10th percentile), appropriate (AGA, 10th-90th), and large-for-gestational age (LGA, >90th) newborns...
April 3, 2024: American Journal of Perinatology