SynthesisBMC pregnancy and childbirth2024
Efficacy of vitamin D supplementation on the incidence of preeclampsia: a systematic review and meta-analysis.
Synthesis in BMC pregnancy and childbirth, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Comparative effectiveness of statins, metformin, and vitamin D, for prevention of preeclampsia: a systematic review and network meta-analysis of randomized trials.BMC pregnancy and childbirth · 2026Pooled it
- Nutritional supplements for preventing preeclampsia: A network meta-analysis.The Indian journal of medical research · 2026Article
- Fertility, pregnancy and lactation in women with systemic lupus erythematosus.Nature reviews. Rheumatology · 2026Review
- Association between serum 25-hydroxyvitamin D [25(OH)D] levels and vaginal delivery in pregnant women: an observational case-control study from Türkiye.Frontiers in medicine · 2026Article
- Maternal serum vitamin D levels and preeclampsia among Kenyan pregnant women: A matched case-control study.PloS one · 2026Article
- Dietary Supplements in Pregnancy and Postpartum: Evidence, Safety Challenges and a Precision Nutrition Framework (GAPSS).Antioxidants (Basel, Switzerland) · 2026Review
- Review
- Maternal Vitamin D Status, Gestational Hypertension, and Preeclampsia: A Cross-Sectional Study in Urban Greece.Biomedicines · 2025Article
- Vitamin D and calcium status in preeclampsia and pregnancy-induced hypertension.Biomolecules & biomedicine · 2025Observational
- Understanding Preeclampsia: Cardiovascular Pathophysiology, Histopathological Insights and Molecular Biomarkers.Medical sciences (Basel, Switzerland) · 2025Review
- Regulation of Renal and Extrarenal Calcitriol Synthesis and Its Clinical Implications.International journal of molecular sciences · 2025Review
- A systematic review and meta analysis on the effect of vitamin D in preeclampsia and gestational diabetes mellitus in pregnancy.AIMS public health · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPreeclampsia is a severe pregnancy complication affecting 2-8% of pregnancies globally, contributing to substantial maternal and fetal morbidity and mortality. Vitamin D deficiency has been associated with an increased risk of preeclampsia, yet the efficacy of its supplementation during pregnancy in reducing preeclampsia incidence remains uncertain.
objectivesThis systematic review and meta-analysis aimed to evaluate the impact of vitamin D supplementation on the incidence of preeclampsia and related maternal and neonatal outcomes.
methodWe systematically searched PubMed, Scopus, Cochrane Library, and Web of Science until August 2024 for randomized controlled trials (RCTs) examining the effects of vitamin D supplementation on preeclampsia. Eligible studies included pregnant women with varying doses of vitamin D supplementation compared to placebo or standard care. Primary outcomes were the incidence of pre-eclampsia and preterm labor; secondary outcomes included serum 25-hydroxyvitamin D levels, low birth weight, and APGAR scores. Data were synthesized using R statistical software, with effect measures reported as relative risk (RR) and mean difference (MD) with a 95% confidence interval (CI).
resultsA total of 33 RCTs involving 10,613 participants were included. Vitamin D supplementation significantly reduced the risk of preeclampsia by 44.8% (RR = 0.55, 95% CI [0.43, 0.71], P < 0.0001) and preterm labor by 30% (RR = 0.70, 95% CI [0.51, 0.96], P = 0.0286). Subgroup analyses indicated that the benefits were more pronounced when the control group received a placebo rather than low-dose vitamin D. Serum 25-hydroxyvitamin D levels significantly increased in the supplementation group (MD = 32.42 nmol/L, 95% CI [20.33, 44.50], P < 0.0001). However, no significant differences were observed in the incidence of low birth weight (RR = 0.65, 95% CI [0.42, 1.02], P = 0.057) or Apgar scores at 5 min (MD = 0.20, 95% CI [-0.01, 0.40], P = 0.057).
conclusionVitamin D supplementation during pregnancy significantly reduces the risk of preeclampsia and preterm labor, though its impact on neonatal outcomes remains unclear. These findings underscore the potential value of vitamin D supplementation in prenatal care for improving maternal outcomes. Further research is needed to clarify its effects on neonatal health.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.