LAUSR

Echocardiography is used to quantitatively characterize cardiovascular function in fetuses with cardiac abnormalities and inform decisions for fetal or perinatal interventions. It is clinically important to understand the reproducibility of these measures, particularly between testers. While studies have reported intra‐observer variability and inter‐observer variability, little is known about test–retest variability for these measures. We hypothesized that even in a high volume echocardiography laboratory, quantitative measurements will demonstrate higher test–retest variability compared with inter‐observer variability and intra‐observer variability of the same measurements.