Preterm low birthweight (below or equal 2500 g) · pregnant women presenting for routine prenatal care
Lower genital tract infection screening probably leads to lower preterm low birthweight (below or equal 2500 g) compared with no screening (moderate certainty).
1 finding from 1 review
Birthweight < 2500 (g) · pregnant women
Any intervention to prevent violence (all interventions) showed no clear difference in number of low‐birthweight (< 2500 g) babies compared with standard care (low certainty).
1 finding from 1 review
Low birthweight · pregnant women
Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in low birthweight (< 2500 g) compared with placebo/no vitamin B12 supplementation (low certainty).
1 finding from 1 review
Low birthweight · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in low Birthweight (< 2500 g) compared with no zinc (with or without placebo) (moderate certainty).
1 finding from 1 review
Low birthweight · healthy pregnant women receiving calcium supplementation vs placebo or no treatment
Calcium supplementation showed no clear difference in low birthweight (< 2500 g) compared with placebo or no treatment (maternal outcomes) (moderate certainty).
1 finding from 1 review
Birthweight < 2500 (g) · pregnant women accessing prenatal care
Group antenatal care showed no clear difference in low birthweight (<2500 g) compared with individual antenatal care (adjusted data) (moderate certainty).
1 finding from 1 review
Birthweight < 2500 (g) · Pregnant women who smoke
Outcomes for all interventions for smoking cessation in pregnancy leads to lower low birthweight (under 2500 g) compared with control: subgrouped by main intervention strategy (comparison 20) (high certainty).
1 finding from 1 review
Low birthweight · pregnant women and their infants..
It is very uncertain whether vitamin D + calcium supplementation changes low birthweight (less than 2500 g) compared with placebo or no intervention (very low certainty).
1 finding from 1 review
Low birthweight · pregnant women and their infants..
Vitamin D + calcium + other vitamins and minerals showed no clear difference in low birthweight (less than 2500 g) compared with calcium + other vitamins and minerals (but no vitamin D) (low certainty).
1 finding from 1 review
Low birthweight · pregnant women and their infants..
Vitamin D supplementation probably leads to lower low birthweight (less than 2500 g) compared with placebo or no intervention (moderate certainty).
1 finding from 1 review
Low birthweight · Women receiving supplements in pregnancy
Any intermittent iron regimen (with or without other vitamins and… showed no clear difference in low birthweight (less than 2500 g) compared with daily regimen (with same vitamins and minerals)‐infant outcomes (low certainty).
1 finding from 1 review
Low birthweight · pregnant women
(Infant outcomes) Any supplements containing iron showed no clear difference in low birthweight (less than 2500 g) (ALL) compared with same supplements without iron or no treatment/placebo (no iron or… (low certainty).
1 finding from 1 review
Low birthweight · pregnant women
(Infant outcomes) Any supplements containing iron and folic acid showed no clear difference in low birthweight (less than 2500 g) (ALL) compared with same supplements without iron nor folic acid (no iron nor folic acid… (low certainty).
1 finding from 1 review
Low birthweight (< 2500 g or < 10th centile) · Pregnant women who had reached the gestational age of fetal viability
Routine fetal movement counting showed no clear difference in low birthweight (< 2500 g or < 10th centile) compared with mixed or undefined fetal movement counting (low certainty).
1 finding from 1 review
Low birthweight · women during pregnancy
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Low birthweight · women during pregnancy
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Intervention not reported
Low birthweight (less than 2500 g) ‐ assuming independence between twins/triplets · women with multiple pregnancy
The intervention showed no clear difference in low birthweight (less than 2500 g) ‐ assuming independence between… (low certainty).
1 finding from 1 review
Intervention not reported
Low birthweight (less than 2500 g) ‐ assuming independence between twins/triplets · women with multiple pregnancy
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found