EP19.06: Standardisation and reproducibility of transperineal measurements of breech progression angle for evaluating fetal breech descent.

This article discusses a study that aimed to evaluate the reproducibility of measurements of breech progression angle (BPA) using transperineal ultrasound (US). The study involved providing 3D ultrasound volumes to eight operators from four maternity units in Spain and Italy. The operators measured the BPA using 3D US volume processing software, and the interobserver reproducibility was assessed. After an online review and the development of an image-based score for BPA measurement, the reproducibility improved. The study concludes that the measurement of BPA is feasible and reproducible when using a standardized image-based score. [Extracted from the article]