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A COMPARATIVE STUDY OF LABOUR AND FOETAL OUTCOME FORINDUCED AND SPONTANEOUS LABOUR AT TERM

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Supervisor: Prof. E. E. Okpere, Prof A. A. E. Orhue, Dr A. B. A. Ande
Faculty: OBSTETRICS AND GYNAECOLOGY
Month: 10
Year: 2011

Abstract

Background: One of the most feared risks of induction of labour is the failure of the intervention resulting in increased rate of caesarean section as compared with spontaneous labour. A favourable Bishop Score has been shown to be one of the strongest predictors of a successful induction of labour. Increased gestational age has also been associated with successful induction of labour and prematurity has been linked with increased rate of failed induction. If these two factors – poor Bishop score and prematurity – are corrected, induction of labour may have labour and foetal outcomes that are comparable with spontaneous labour. Objectives: To compare the labour and perinatal outcome between spontaneous and induced labour (with favourable Bishop score) at term . Method: It is a prospective cohort study conducted in the Labour Ward of the University of Benin Teaching Hospital, Benin-City. The study had two arms: the first arm included women with term pregnancies in spontaneous active phase labour while the second arm included women with term pregnancies who presented in Labour Ward for induction of labour. The second arm of the study comprised women who presented for induction of labour for medical/obstetric indications. It was ensured that all women for induction had a favourable Bishop score at the start of induction. All the women had singleton pregnancies with cephalic presenting foetuses. The outcome measures were spontaneous vaginal delivery, instrumental delivery, caesarean section, blood loss at delivery and genital tract injury. Foetal outcome measures were birth weights, APGAR scores ii and admission into Special Baby Care Unit. All information was coded and analysed using SPSS 15 statistical package. Categorical data were expressed as percentages and compared using chi square test, while numerical data were expressed as mean ± SD and compared using Student t test. Odds ratio and 95% confidence interval was computed and the level of significance was set as p< 0.05 or confidence interval excluding 1.

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