Title THE RELATIONSHIP BETWEEN ULTRASOUND ASSESSED CERVICAL LENGTH AND PERFORMANCE OF INDUCED LABOUR. Background Unfavorable cervix has been shown to be the leading cause of failed induction of labour. The current method for the assessment of the cervical ripening preceding induction of labor (the Bishop score) may be partly responsible as it appears subjective. Presently, there is a shift towards research for less invasive and more objective methods for cervical ripeness assessment prior to induction of labour. One of which is the ultrasound cervical assessment, with various critical length documented and racial differences of varied cut-off suggested. Aim/Objectives This work therefore, aimed to study the relationship between ultrasound determined cervical length and induction of labour using specified outcomes. The outcome include the critical cervical length associated with successful vaginal delivery and the time from onset of induction to delivery. Study Method A prospective cohort study, among 114 women selected using the simple random sampling technique from patients billed for induction of labour between 37 to less than 42 weeks gestation, in Obstetrics and Gynaecology department of UBTH. Bishop score assessment was done, parturient with favorable cervix had cervical length measurement using transvaginal ultrasound scan. Monitoring in labour ensued, recording the time from onset to delivery. Data was analyzed using IBM Statistical Package for Scientific Solution version 21 (R) software (SPSS Inc. Chicago, IL, USA).