Abstract

To systematically assess the effect of discontinued vs continued oxytocin after active stage of labour is established. Pubmed, Embase, and the Cochrane Library were systematically searched to 18 April 2021. The risk ratio or mean difference with corresponding 95% confidence interval were computed to investigate the effect of intervention or control on maternal and fetus outcomes. This review was registered in the International Prospective Register of Systematic Reviews: CRD42021249635. Discontinuing oxytocin when the active labour was established might decrease the risk of cesarean delivery [RR (95% CI): 0.84 (0.72-0.98), P = 0.02]. However, when we restricted our analysis to women who performed cesarean section after the active phase was reached, the difference was no longer significant [RR (95% CI): 0.82 (0.60-1.10), P = 0.19]. The incidence of uterine tachysystole [RR (95% CI): 0.36 (0.27-0.49)], postpartum hemorrhage [RR (95% CI): 0.78 (0.65-0.93)], and non-reassuring fetal heart rate [RR (95% CI): 0.66 (0.58-0.76)] were significantly lower in the oxytocin discontinuation group. We also found a possible decrease in the risk of chorioamnionitis in discontinued oxytocin group [RR (95% CI): 2.77 (1.02-5.08)]. An increased duration of active [MD (95% CI): 2.28 (2.86-41.71)] and second [MD (95% CI): 5.36 (3.18-7.54)] phase of labour was observed in discontinued oxytocin group, while the total delivery time was not significantly different [MD (95% CI): 20.17 (-24.92-65.26)]. After the active labor is reached, discontinuation of oxytocin could be considered a new recommendation for the improved maternal and fetal outcomes without delaying labour.

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