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
Preterm very low birthweight (below or equal 1500 g) · pregnant women presenting for routine prenatal care
Lower genital tract infection screening probably leads to lower preterm very low birthweight (below or equal 1500 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 · women during pregnancy
It is very uncertain whether A dose of vitamin D 601 IU or higher changes low birthweight compared with 600 IU or lower alone or with other nutrients (very low certainty).
1 finding from 1 review
Low birthweight · women during pregnancy
Multiple micronutrients leads to lower low birthweight compared with control (iron with or without folic acid) (high certainty).
1 finding from 1 review
Low birthweight · women during pregnancy
A dose of vitamin D 4000 IU/d or more showed no clear difference in low birthweight compared with 3999 IU/d or less alone or with any other nutrient (low certainty).
1 finding from 1 review
Low birthweight · women during the preconception, pregnancy and postpartum period
Any supplement containing iodine showed no clear difference in low birthweight compared with same supplement without iodine or no treatment/placebo (child… (low certainty).
1 finding from 1 review
Low birthweight · pregnant women, either during the prenatal period or during labour.
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Low birthweight · Pregnant women recruited before 20 weeks' gestation
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Low birthweight · pregnant women
1 finding from 1 review
Low birthweight · pregnant women
One intervention showed no clear difference in low birthweight compared with no intervention (high certainty).
1 finding from 1 review
Low birthweight · pregnant women with heartburn in pregnancy
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
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 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