Comparison 1. Oxytocin versus Placebo (Saline).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Caesarean section	2	319	Risk Ratio (M‐H, Fixed, 95% CI)	0.95 [0.42, 2.12]
1.1 Cervical dilatation < 10 cm	1	93	Risk Ratio (M‐H, Fixed, 95% CI)	1.17 [0.46, 2.96]
1.2 Cervical dilatation 10 cm	1	226	Risk Ratio (M‐H, Fixed, 95% CI)	0.55 [0.10, 2.92]
2 Instrumental deliveries	2	319	Risk Ratio (M‐H, Fixed, 95% CI)	0.88 [0.72, 1.08]
2.1 Cervical dilatation < 10 cm	1	93	Risk Ratio (M‐H, Fixed, 95% CI)	0.95 [0.67, 1.34]
2.2 Cervical dilatation 10 cm	1	226	Risk Ratio (M‐H, Fixed, 95% CI)	0.85 [0.66, 1.09]
3 Combined operative deliveries	2	319	Risk Ratio (M‐H, Random, 95% CI)	1.01 [0.68, 1.50]
4 Apgar < 7 at 5 minutes	2	319	Risk Ratio (M‐H, Fixed, 95% CI)	3.06 [0.13, 73.33]
5 Apgar < 4 at 5 minutes	1	226	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
6 Admission to NICU	2	319	Risk Ratio (M‐H, Fixed, 95% CI)	1.07 [0.29, 3.93]
7 Uterine hyperstimulation	1	226	Risk Ratio (M‐H, Fixed, 95% CI)	1.32 [0.97, 1.80]
8 Postpartum haemorrhage	2	319	Risk Ratio (M‐H, Fixed, 95% CI)	0.96 [0.58, 1.59]