evidencegaps
Findings

What do systematic reviews say?

Refine by population, intervention, comparison or outcome
More filters
Evidence found and GRADE certainty

7 questions · 7 findings · 5 reviews · Pregnancy and Childbirth

Sort:Best matchNewestHighest certaintyDownload CSV
No studies found 0 · 0%GRADE not reported 1 · 14.3%Very low 0 · 0%Low 4 · 57.1%Moderate 0 · 0%High 2 · 28.6%

Vitamin E vs placebo, no placebo or other supplements

Preterm birth · pregnant women receiving vitamin E supplementation or control, living in areas where there is either inadequate dietary intake of vitamin…

Any vitamin E supplementation showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with placebo, no placebo or other supplements (high certainty).

1 finding from 1 review

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 D + calcium + other vitamins and minerals vs calcium + other vitamins and minerals (but no vitamin D)

Preterm birth · pregnant women and their infants..

Vitamin D + calcium + other vitamins and minerals showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with calcium + other vitamins and minerals (but no vitamin D) (low certainty).

1 finding from 1 review

Intervention not reported

Preterm birth (< 37 weeks' gestation) · All pregnant women receiving either vitamin C supplementation or control either in areas where there is inadequate dietary intake or where…

The intervention showed no clear difference in preterm birth (< 37 weeks' gestation) (high certainty).

1 finding from 1 review