Findings

What do systematic reviews say?

63 questions · 63 findings · 5 reviews · Pregnancy and Childbirth

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No studies found 12 · 19%GRADE not reported 7 · 11.1%Very low 13 · 20.6%Low 22 · 34.9%Moderate 9 · 14.3%High 0 · 0%

Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo

Preterm birth · pregnant women

Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty).

1 finding from 1 review

Vitamin B12 supplementation during pregnancy for maternal and child health outcomes 2024 · Cochrane Headline outcomes only
RR 0.97 [0.55, 1.74]
2 studies · 340 participants
Low

Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo

Child cognitive outcomes · pregnant women

1 finding from 1 review

Vitamin B12 supplementation during pregnancy for maternal and child health outcomes 2024 · Cochrane Headline outcomes only
no estimate extracted
1 study · 178 participants
Low

Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo

Neural tube defects ‐ not reported · pregnant women

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin B12 supplementation during pregnancy for maternal and child health outcomes 2024 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found