Comparison 2. Serial ultrasound and Doppler ultrasound vs selective ultrasound.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 CTG (cardiograph)	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.01 [0.93, 1.09]
2 Induction of labour	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.02 [0.92, 1.14]
3 Caesarean section	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.89 [0.76, 1.03]
4 Elective caesarean section	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.95 [0.77, 1.17]
5 Emergency caesarean section	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.82 [0.64, 1.05]
6 Gestation at delivery (mean, SD)	1	2834	Mean Difference (IV, Fixed, 95% CI)	−0.10 [−1.21, 1.01]
7 Birthweight (mean, SD)	1	2834	Mean Difference (IV, Fixed, 95% CI)	−25.0 [−67.53, 17.53]
8 Birthweight < 10th centile	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.36 [1.10, 1.68]
9 Birthweight < 3rd centile	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.66 [1.10, 2.51]
10 Low birthweight (< 2.5 kg)	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.14 [0.85, 1.52]
11 Very low birthweight (< 1.5 kg)	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	1.27 [0.65, 2.49]
12 Neonatal resuscitation	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.98 [0.92, 1.05]
13 Neonatal ventilation	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.67 [0.41, 1.09]
14 Admission to special care baby unit	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.95 [0.68, 1.31]
15 Apgar score < 7 at 5 minutes	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.77 [0.46, 1.27]
16 Neonatal intraventricular haemorrhage	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.80 [0.22, 2.98]
17 Perinatal mortality	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.59 [0.30, 1.17]
18 Stillbirths	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.84 [0.36, 1.93]
19 Neonatal deaths	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.30 [0.08, 1.09]
20 Neonatal death (excluding congenital abnormalities)	1	2834	Risk Ratio (M-H, Fixed, 95% CI)	0.40 [0.08, 2.06]