Abstract: Increasing rate of caesarean section in all over the world made us perform study on trial of labour in patient with one previous caesarean section in Alzahra Hospital , the center of gynecology obstetric in Najaf , We take number of patients in labour room start labour spontaneously with previous one of caesarean section, lower segment transvers, including case was selected for elective caesarean section but suddenly start labour number of them delivers by emergency caesarean section we compare this percentage with other study the result was acceptable we encourage trial of labour after one caesarean section as a safe mode of delivery that decrease rate of caesarean section and its complications we recommend farther in this evaluate field.