Three Types of Placenta Previa: Marginal, Partial, Complete Central Previa Refers to a Complete Previa Where the Central Portion the Placenta is Located over the Cervical Os

Reprinted with permission from

KayHH. Placenta previa and abruption. In: GibbsRS, KarlanBY, HaneyAF, NygaardI, eds. Danforth's Obstetrics and Gynecology. 10th ed. Baltimore, MD: Lippincott Williams & Wilkins; 2008:386

, Figure 21-1.