<prompt> Nitabuchs layer is absent is-Placenta accretePlacenta previaPlacenta membranaciaCircumvillate placenta  <response>: Ans is a i.e., Placenta accrete Nitabuchs layero During formation of placenta, there is an area of fibrinoid degeneration where trophoblast cells covered with syncytium meet the decidua. This zone is known as Nitabuchs layer. This layer limits further invasion of the decidua by the trophoblast.Note: This membrane is absent in placenta accreta. 