Comparison 3. Oral iron versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Digit Symbol Substitution test ‐ 10 weeks	1	51	Mean Difference (IV, Fixed, 95% CI)	0.0 [‐2.76, 2.76]
2 EPDS ‐ 10 weeks	1	51	Mean Difference (IV, Fixed, 95% CI)	0.10 [‐0.86, 1.06]
3 STAI ‐ 10 weeks	1	51	Mean Difference (IV, Fixed, 95% CI)	‐0.40 [‐3.18, 2.38]
4 Percieved Stress ‐ 10 weeks	1	51	Mean Difference (IV, Fixed, 95% CI)	4.1 [1.70, 6.50]
5 Breastfeeding at two days postpartum	1	122	Risk Ratio (M‐H, Fixed, 95% CI)	0.82 [0.58, 1.17]
6 Back pain	1	150	Risk Ratio (M‐H, Fixed, 95% CI)	0.66 [0.42, 1.03]
7 All gastrointestinal symptoms	1	68	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.36, 2.79]