Abstract
Uterine activity was quantified in women with a previous caesarean scar and a slow progress of labour who needed oxytocin augmentation. Of the 63 women 49 (78%) progressed well (mean cervical dilatation rate of 1.5 cm/h) and were delivered vaginally. Fourteen women had slow progress of labour (0.3 cm/h) and were delivered by caesarean section despite adequate and similar augmented uterine activity to that in the women who were delivered vaginally. Those who were delivered by caesarean section had a significantly higher mean maximum dose of oxytocin and a longer period of augmentation. All caesarean sections were for cephalopelvic disproportion and the mean birthweight of babies born by caesarean section (3598 g) was significantly higher than that of babies born vaginally (3230 g). Satisfactory rate of cervical dilatation in the presence of optimal uterine activity is predictive of favourable outcome when oxytocin is used for dysfunctional labour after previous caesarean section.
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