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Figure S1. Trials and observational studies of vitamin D supplementation and mean birthweight (in grams).

Figure S2. Trials of vitamin D supplementation and SGA and low birthweight, disaggregated by dosing approach.

Figure S3. Trials of vitamin D supplementation and mean crown–heel length (in cm).

Figure S4. Trials of vitamin D supplementation and mean daily weight gain during the 3rd trimester (in grams).

Figure S5. Supplementation and preterm delivery and mean duration of gestation, disaggregated by dosing approach.

Figure S6. Observational studies of vitamin D intake and mean gestational age.

Figure S7. Observational studies of vitamin D intake and pre-eclampsia risk.

Table S1. Search strategy and keywords.

Table S2. Evaluation of the quality of eligible trials for potential inclusion in the meta-analysis.

Table S3. Evaluation of the quality of evidence of individual observational studies for potential inclusion in the meta-analysis.

Table S4. Prospective observational studies of the relationship between maternal blood levels of 25(OH)D during pregnancy and measures of fetal growth, birth weight, and preterm birth.

Table S5. Prospective observational studies of the relationship between maternal blood levels of 25(OH)D during pregnancy and pre-eclampsia.

Table S6. Baseline and attained levels of maternal 25(OH)D at delivery in trials.

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