Comparison 8. (2.1) PGF2a vs placebo (all women).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Uterine hyperstimulation with FHR changes	1	32	Risk Ratio (M‐H, Fixed, 95% CI)	3.0 [0.13, 68.57]
2 Caesarean section	4	467	Risk Ratio (M‐H, Fixed, 95% CI)	0.59 [0.31, 1.14]
3 Cervix unfavourable/unchanged after 12 to 24 hours	2	170	Risk Ratio (M‐H, Fixed, 95% CI)	0.20 [0.11, 0.37]
4 Oxytocin augmentation	3	202	Risk Ratio (M‐H, Random, 95% CI)	0.59 [0.32, 1.07]
5 Epidural analgesia	4	467	Risk Ratio (M‐H, Fixed, 95% CI)	0.74 [0.56, 0.97]
6 Instrumental vaginal delivery	3	435	Risk Ratio (M‐H, Fixed, 95% CI)	0.63 [0.47, 0.84]