Comparison 1. Antibiotic versus no antibiotics.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Maternal febrile morbidity/fever	56	9046	Risk Ratio (M‐H, Random, 95% CI)	0.45 [0.40, 0.51]
2 Maternal wound infection	82	14407	Risk Ratio (M‐H, Fixed, 95% CI)	0.40 [0.35, 0.46]
3 Maternal endometritis	83	13548	Risk Ratio (M‐H, Fixed, 95% CI)	0.38 [0.34, 0.42]
4 Maternal serious infectious complications	32	6159	Risk Ratio (M‐H, Fixed, 95% CI)	0.31 [0.20, 0.49]
5 Maternal urinary tract infection	66	10928	Risk Ratio (M‐H, Fixed, 95% CI)	0.56 [0.49, 0.65]
6 Maternal adverse effects	13	2131	Risk Ratio (M‐H, Fixed, 95% CI)	2.43 [1.00, 5.90]
7 Maternal days in hospital	19	3168	Mean Difference (IV, Random, 95% CI)	‐0.46 [‐0.65, ‐0.28]