Role of Assessing Cervical Length by Transvaginal Ultrasound before Induction of Labour
Assessing Cervical Length by Transvaginal Ultrasound
Background: Aims: The study aimed to evaluate the effectiveness of cervical length, measured by transvaginal ultrasound (TVS), to predict successful induction of labor at term and association of cervical length measurements with induction of labor. Subjects and Methods: A cross sectional study design was used to collect data was collected from 50 women between 36-40 weeks of gestation who presented at the study institute. Cervical length was measured using transvaginal ultrasound and the association of cervical length with induction of labour was examined. A p value <0.05 was considered as statistically significant. Results: Twenty one (51.21%, 95% CI: 36.49, 65.74) of 41 pregnant women had successful induction of labour. The mean cervical length of the 41 study participants was 20.19 ± 5.87 (range 10 to 32) mm. Twenty five women had a cervical length < than 20. Cervical length was associated (X2 test p=0.007) with successful induction of labour. Mean cervical length was significantly different (student t test p=0.0003) between women with successful induction of labour (17.14 ± 3.94 mm) and women with failed induction of labour (23.4 ± 5.92 mm).Cervical length showed slightly good sensitivity (80.95%). It showed a positive predictive value of 68%, negative predictive value of 75% and specificity of 60%. Conclusion: Transvaginal ultrasound measures of cervical length before inducing a patient can help to identify women at risk for failed induction and reduce rate of unnecessary caesarean section and complications of prolonged and failed labour after induction.