Jauniaux E, et al. - Researchers sought to evaluate the prevalence of placenta accreta spectrum in general population studies and the main maternal outcomes at delivery. They included 29 articles that met the defined criteria, including 22 retrospective and 7 prospective studies comprising 7,001 cases of placenta accreta spectrum out of 5,719,992 births. Studies in this meta-analysis showed wide variation for the prevalence rate of placenta accreta spectrum and for the different grades of accreta placentation. This highlights the necessity for consistency in definitions used to describe placenta accreta spectrum at birth and in reporting on this increasing common obstetric complication.