Objectives: To review the incidence and factors associated with scar dehiscence/rupture. Material and methods: A prospective partographic analysis of patients who underwent trial of labour with previous caesarian section was carried out in tertiary referral center in UISEMH, Kanpur during year 2007-2008. In this study incidence of scar dehiscence/rupture during trial of labour and its relationship with different factors as time lapse from previous caesarian section and indication of previous caesarian section were studied. Result : Of the 100 women included in the study, 66% had a successful trial of labour. In this study, scar dehiscence rate was 4% and scar rupture rate was 2%.