Nitabuchs layer is absent is-
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 Nitabuch's layer. This layer limits further invasion of the decidua by the trophoblast.Note: This membrane is absent in placenta accreta.
Placenta accrete
Placenta previa
Placenta membranacia
Circumvillate placenta
Abortion