Comparison 28. Oestrogen versus extraamniotic prostaglandins: all primiparae, unfavourable cervix.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2 Uterine hyperstimulation with FHR changes	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.16, 6.20]
3 Caesarean section	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.07, 14.55]
4 Serious neonatal morbidity or perinatal death	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	0.33 [0.01, 7.58]
8 Uterine hyperstimulation without FHR changes	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	0.33 [0.01, 7.58]
11 Instrumental vaginal delivery	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.42, 2.40]
16 Perinatal death	1	30	Risk Ratio (M‐H, Fixed, 95% CI)	0.33 [0.01, 7.58]