<scp>FIGO</scp> consensus guidelines on placenta accreta spectrum disorders: Prenatal diagnosis and screening,

Abstract

1 INTRODUCTION : Recent population studies have shown that placenta accreta spectrum (PAS) disorders remain undiagnosed before delivery in half1, 2 to two‐thirds of cases.3 In a series from specialist diagnostic units in the USA, around one‐third of cases of PAS disorders were not diagnosed during pregnancy.4 Maternal mortality and morbidity are reduced when women with PAS disorders, particularly the invasive forms—placenta increta or percreta—deliver in a center of excellence by a multidisciplinary care team with experience in managing the surgical risks and perioperative challenges presented by these disorders.5-8 Transfer to a center of excellence, however, relies on both recognition of the women at risk of PAS disorders and on accurate prenatal diagnosis.\nCurrent prenatal diagnosis rests on subjective interpretation of “typical” sonographic findings or signs with two‐dimensional (2D) grey‐scale and color Doppler imaging. Many signs have been reported in the literature with varying descriptions as to their sensitivity and specificity.9 The published literature is difficult to interpret because of several problems in the definition, terminology, and diagnosis of this disorder.10 To improve consistency and allow appropriate comparison of different imaging markers, panels of experts have published consensus statements that aim to standardize the descriptions and minimum requirements for an ultrasound scan to diagnose PAS disorders.11, 12 [...]