Comparison 3. Oestrogen versus placebo: all women, intact membranes, unfavourable.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
3 Caesarean section	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	1.33 [0.69, 2.56]
7 Oxytocin augmentation	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	0.93 [0.61, 1.43]
11 Instrumental vaginal delivery	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	0.84 [0.44, 1.60]
12 Meconium stained liquor	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	0.49 [0.13, 1.83]
14 Neonatal intensive care unit admission	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	0.98 [0.06, 15.13]
20 Serious maternal complications	1	87	Risk Ratio (M‐H, Fixed, 95% CI)	2.93 [0.85, 10.10]