<prompt> Which of the following types of placenta complicates third stage of labour and is associated with a past history of caesarean section: September 2011Placenta succenturitaPlacenta extracholisPlacenta membranecaePlacenat accrete  <response>: Ans. D: Placenta accreta Most impoant risk factors for placenta accreta are the placenta prae and prior caesarean delivery It complicates 3rd stage of labour haemorrhage, shock, infection and rarely inversion of the uterus Other types of placenta: Biscoidal placenta: Placenta have 2 discs Lobed placenta: Placenta divided into lobes Placenta succenturita: Small pa of placenta separated from the rest Febestrated: Placenta having a hole in centre Circumvallate: Edge of placenta is covered by circular fold of decidualis 