Placenta percreta causing acute abdomen in the second trimester of pregnancy.

: Two cases of acute abdomen due to haemoperitoneum caused by placenta percreta in the second trimester are presented. Both had a history of previous lower segment caesarean section, a factor well-known to predispose the condition. However, the rarity of the condition, presenting in mid pregnancy makes diagnosis and management difficult. Optimum ways of management are discussed.