Abnormally adherent placentation: a life-threatening complication.

Two cases are presented illustrating the potential danger of abnormal placentation. Placenta accreta is frequently associated with placenta praevia and/or a history of previous caesarean section. As there are no obvious specific symptoms before or during delivery, one should consider the possibility of this anomaly in the third stage of labour when manual removal of the placenta is very arduous. The treatment of choice is immediate abdominal hysterectomy, for this is followed by the lowest maternal mortality. If abnormal placentation is suspected, one should be prepared to deal with it as necessitated, including the possible performance of an emergency caesarean hysterectomy.