Abnormal Fetal Findings Associated With a Global Sphericity Index of the 4‐Chamber View Below the 5th Centile

Objectives The purpose of this study was to evaluate the global sphericity index (GSI) of the 4‐chamber view and correlate the results with abnormal ultrasound findings. Methods The epicardial end‐diastolic basal‐apical length (BAL) and transverse length (TL) of the 4‐chamber view were measured to compute the GSI (BAL/TL) in 200 control fetuses between 20 and 40 weeks' gestation. Three hundred study fetuses were prospectively examined between 17 and 39 weeks' gestation. The GSI, Z score, and centile were computed for each of the fetuses. Results The GSI (1.233; SD, 0.0953) in the control fetuses was independent of gestational age. Eighteen percent of the study fetuses (55 of 300) had a GSI below the 5th centile (