Placenta accreta, also referred to as a morbidly adherent placenta, is a novel pathologic entity. It was first described in the 20th century and reported in the 1930s, which suggests that this entity did not exist, or at least was quite rare, before the 1930s.1 The apparent rarity before that time is probably related to the rare occurrence of cesarean deliveries before the 1900s; thus, the association with morbidly adherent placentas was quite uncommon. The diagnosis can be made with sonography or in some cases with magnetic resonance imaging (MRI), but this article will show that sonography should be the imaging modality of choice for placenta accreta.