FIGO Classification for the Clinical Diagnosis of Placental Accreta Spectrum Disorders

(Int J Gynecol Obstet. 2019;146:20–24) Placenta accreta has been diagnosed using the same criteria for nearly a century: a placenta adherent to the uterine wall without easy separation and/or bleeding from the placental bed, and an absence of a decidual layer/nitabuch layer between the placenta and myometrium. Evidence suggests a connection between the rising incidence of placenta accreta and the rising incidence of cesarean sections.