Timing Strategies for Delivery of Individuals with Placenta Praevia and Accreta

Morbidly adherent placenta occurs when there is a defect of the decidua basalis, resulting in abnormal attachment of placenta to myometrium. It is due to imperfect development of nitabuch layer (a fibrinoid layer separating decidua basalis from placental villi). MOBIDLY ADHERENT PLACENTA CAN BE OF DIFF. TYPES/GRADES PLACENTA ACCRETA There is direct contact of chorionic villi with myometrium without intervening decidua basalis PLACENTA INCRETA Chorionic villi invade myometrium but donot reach serosal layer. PLACENTA PERCRETA Chorionic villi invade myometrium to reach or extend beyond serosa into surrounding tissues or organs.