TY - CHAP M1 - Book, Section TI - Placenta Previa and Morbidly Adherent Placenta A1 - Yeomans, Edward R. A1 - Hoffman, Barbara L. A1 - Gilstrap III, Larry C. A1 - Cunningham, F. Gary Y1 - 2017 N1 - T2 - Cunningham and Gilstrap's Operative Obstetrics, 3e AB - In some pregnancies, the placenta may develop at an abnormal location or may extensively invade the adjacent myometrium. Clinical entities include placenta previa, in which trophoblastic cells implant over or near the internal cervical os (Fig. 27-1). In other cases, trophoblast aggressively burrows into the myometrium. Depending on the invasion depth, placenta accreta, placenta increta, or placenta percreta is diagnosed (Fig. 27-2). The term placenta accrete syndromes is clinically useful to summarize these three types and is used here and throughout the text. Another interchangeable phrase also often used is morbidly adherent placenta (Bailit, 2015; Silver, 2015a). SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/20 UR - obgyn.mhmedical.com/content.aspx?aid=1138215463 ER -