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Submitted: 16 May 2007 Modified: 26 February 2018
HERDIN Record #: PCHRDPC040196

The use of transvaginal ultrasound to predict vaginal delivery.

Lyra Ruth C. Chua,
Kathleen Grace C. Gamutan

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OBJECTIVE: To evaluate the accuracy of transvaginal ultrasonography of the cervix to predict successful induction of labor when compared to cervical digital examination, in women undergoing induction of labor.

METHODS: Transvaginal ultrasound and digital vaginal examination were performed on 30 women at ≥37 weeks gestation, immediately before labor induction. Ultrasound assessment was compared with the Bishop score. The end point of the study was the percentage of patients who underwent vaginal delivery.

STUDY DESIGN: Cohort prospective.

RESULTS: The cervical length cut off of ≤32 mm was considered as the optimum cut off to predict vaginal delivery after induction of labor with an accuracy of 90%. A Bishop score cut off ≥5 was considered as the optimum cut off to predict successful vaginal delivery after induction of labor with an accuracy of 80%. Hence, by comparing the diagnostic and predictive value of the cervical length and the Bishop score, it was noted that the cervical length was a better predictor of vaginal delivery. When the cervical length of ≤32 mm was combined with a Bishop score of ≥5, the proportion of the subjects who underwent vaginal delivery increased to 100% and the difference in proportion was statistically significant (p value = 0.01).

CONCLUSION: This study showed that a cervical length of ≤32 mm and a Bishop score of ≥5 may be used to predict successful vaginal delivery. It also showed that cervical length of ≤32 mm was a better predictor and became more significant if concomitantly present with a Bishop score of ≤5. (Author)

Publication Type
Publication Sub Type
Journal Article, Original
Philippine Journal of Obstetrics and Gynecology
Publication Date
January-March 2003

Publication Type
Research Report
November 30, 2002
LocationLocation CodeAvailable FormatAvailability
Philippine Council for Health Research and Development Library Box no. 52-A Fulltext pdf (Request Document)

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