| 2009A1 | 13 (61,705) | Placebo, or iron and folate | RR = 0.81 (0.73 to 0.91) vs. placebo | No difference | — |
| | | RR = 0.83 (0.74 to 0.93) vs. iron and folate | | |
| 2009A2 | 12 (27,676) | Iron and folate | RR = 0.89 (0.83 to 0.97)* | RR = 0.91 (0.84 to 0.99)* | Increased rates of small-for-gestational-age births |
| 2011A3 | 14 (67,213) | Iron and folate | NR | RR = 0.91 (0.86 to 0.96) | Increased neonatal mortality in areas with more than 60% home births |
| 2012A4 | 21 (75,785) | Iron and folate | RR = 0.89 (0.83 to 0.94) | RR = 0.87 (0.81 to 0.95) | Decreased neonatal mortality if started after 20 weeks' gestation |
| 2012A5 | 16 (61,972) | Less than three micronutrients (usually iron and folate) | RR = 0.86 (0.81 to 0.91) | RR = 0.83 (0.73 to 0.95) | Increased neonatal mortality if started after first trimester |