BACKGROUND: Traditionally and commonly, the Bishop’s score has been used as a method of pre induction assessment with varying successes. It is subjective and disadvantaged by inter-observer variations. More recently, in a bid to invent a tool that is more objective with better success, transvaginal sonographic cervical length is being studied. AIM/OBJECTIVE: To compare the accuracies of transvaginal sonographic cervical length and the modified Bishop’s score in predicting successful induction of labour using misoprostol among primigravid women at term in Federal Medical Centre, Owerri. METHODOLOGY: A prospective comparative study was carried out on ninety consenting primigravid women. Each participant had pre-induction cervical assessment by transvaginal sonographic cervical length and modified Bishop’s score followed by IOL using 25 micrograms misoprostol. Induction outcomes (vaginal delivery within 24 hours of commencement of induction and caesarean delivery) were determined. Data derived from all the participants were recorded on structured questionnaires and analysed using the IBM statistical package for social sciences (SPSS) software (Version 23.0). The accuracies of TVS cervical length and the modified Bishop’s score in predicting successful IOL and the best diagnostic cut-off values were derived from the Receiver Operator Characteristic curve analysis. In all statistical analyses, p<0.05 (95% confidence interval) was considered significant.