Ultrasound Assessment of Breech Engagement: Breech Progression Angle and Prediction of External Cephalic Version Success.

ABSTRACT: Objectives: To evaluate the role of breech progression angle (BPA), a novel transperineal ultrasound parameter, as a predictor of external cephalic version (ECV) success, and to compare BPA between breech and transverse lie presentations. Methods: This prospective exploratory study was nested within a randomized clinical trial (NCT06449430) at Virgen de la Arrixaca University Hospital, Murcia, Spain. Eligible participants were pregnant women ≥18 years with a singleton fetus in non-cephalic presentation at term, without contraindications to vaginal birth. BPA was measured transperineally following standardized methodology prior to ECV, performed under either spinal analgesia or propofol sedation. Logistic regression models adjusted for maternal and obstetric variables assessed

SUBMITTER: Sanchez-Romero J 

PROVIDER: S-EPMC12564991 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature