Relationship between Bishop Score and Success of Induction of Labour in Federal Teaching Hospital, Abakaliki, Ebonyi State

Abstract

Background: The ripeness of the cervix is of critical importance to the probability of successful labour induction. Aim: To determine the relationship between successful induction of labour and Bishop score. Materials and Methods: A retrospective study of all obstetric patients who had induction of labour between January 1 st 2012 and December 31st 2015 was done in Federal Teaching Hospital Abakaliki. The information obtained from patients' case notes was analyzed using descriptive and inferential statistics at an alpha level of 0.05 for all statistical tests. Results: During the study period, there were 9548 deliveries; 2.76% (264) was by induction of labour with success rate of 75.4%. The mean age of the women was 28.4 ± 5.8 years; majority where nulliparous (45.45%). The most common indication for induction of labour was postdatism (43.94%). Success of induction of labour was most likely at Bishop score of 8 to 10 (OR = 0.79, 95% CI 0.72-0.84). Induction delivery interval was shortest with use of Foley catheter and misoprostol. Conclusion: Our study has shown that success of induction of labour was most likely at Bishop Score of 8-10. We advocate the use of Foley catheter and misoprostol for cervical ripening especially when there is need to expedite delivery.

Induction of Labour

“…The Calder Modification replaces cervical effacement with cervical length with a total score of 12 (Table 2) [31,32]. In a retrospective study [33] done recently to closely look at the relationship between bishop score and successful induction, a higher bishop score (8-10) at the beginning of IOL is directly proportional to the higher rates of successful IOL compared with bishop score between 6 and 7. There is recent evidence to show that the cervical length assessment by transvaginal ultrasound appear to be superior to the bishop score, however this is not a routine practice [34].…”

Induction of labour – a misused blessing: Prospective study of factors influencing the success of induction and comparison of fetomaternal outcomes with spontaneous labour

“…Bishop score has proven to be a good predictor of successful induction in many studies. [12,13] We noticed that women with a Bishop score >6 had a better success rate compared with women with a score <5 (p=0.272). Although Bishop score is an important predictor of the success of induction, the systematic review done by Kolkman et al [14] concluded that Bishop score, individually, was a poor predictor of the outcomes of induced labour.…”

Fetal and maternal outcome of higher-order multiple pregnancies in a tertiary hospital: A 5-year single-center observational study from Nigeria

“…They are assisted by trained midwives. Parturients in labor are admitted in the labor ward when the cervical dilatation is 4 cm and above, while those for induction of labor are admitted when the Bishop score 13 is 6 and above. They were managed with individualized partograph according to the departmental protocol.…”