Diagnostic accuracy of the placenta accreta index for placenta accreta spectrum: A prospective study.

Objective: To evaluate the role of the placenta accreta index (PAI) score in predicting placenta accreta spectrum (PAS).

Methods: In this prospective study, the PAI was applied to 100 third-trimester pregnant women with at least one previous cesarean delivery (CS) and anterior low-lying placenta or placenta previa. PAI score was calculated based on placental location, number of CS, abnormal placental lacunae, sagittal smallest myometrial thickness (SSMT), and bridging vessels.