Trial reportBMC pregnancy and childbirth2024
Effect of early vitamin D supplementation on the incidence of preeclampsia in primigravid women: a randomised clinical trial in Eastern Democratic Republic of the Congo.
Trial report 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 15 papers, 3 of them syntheses 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 3 syntheses or guidelines pooled it, 13 citations in OpenAlex.
- 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
- Hypertensive disorders of pregnancy in low- and middle-income countries: a review of antenatal interventions to improve maternal outcomes.Frontiers in global women's health · 2026Pooled it
- Efficacy of vitamin D supplementation on the incidence of preeclampsia: a systematic review and meta-analysis.BMC pregnancy and childbirth · 2024Pooled it
- Nutritional supplements for preventing preeclampsia: A network meta-analysis.The Indian journal of medical research · 2026Article
- Maternal serum vitamin D levels and preeclampsia among Kenyan pregnant women: A matched case-control study.PloS one · 2026Article
- Challenges and Prospects in Managing Hypertensive Disorders of Pregnancy in Sub-Saharan Africa: A Narrative Review.International journal of women's health · 2026Review
- 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
- The Role of Vitamin D Supplementation in Preventing Pre-Eclampsia: A Review of Randomized Controlled Trials with Meta-Analysis.Healthcare (Basel, Switzerland) · 2025Review
- The necessity of gestational vitamin D supplementation depends on ambient temperature: concern for infant vitamin D status.Frontiers in nutrition · 2025Article
- A systematic review and meta analysis on the effect of vitamin D in preeclampsia and gestational diabetes mellitus in pregnancy.AIMS public health · 2025Review
- Integrating Endocrine, Genomic, and Extra-Skeletal Benefits of Vitamin D into National and Regional Clinical Guidelines.Nutrients · 2024Review
- Prenatal vitamin D deficiency exposure leads to long-term changes in immune cell proportions.Scientific reports · 2024Article
- The Impact of Stress and Social Determinants on Diet in Cardiovascular Prevention in Young Women.Nutrients · 2024Review
- Endocrine roles of vitamin D in female reproduction: Mechanisms and clinical implications.Women's health (London, England)Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPrevious studies have reported the association between maternal vitamin D deficiency and preeclampsia. However, the efficacy of vitamin D supplementation in reducing the occurrence of preeclampsia remains unclear. The objective of this study was to evaluate the effect of cholecalciferol supplementation on the incidence of preeclampsia in primigravid women and its related maternal and foetal outcomes.
methodsA single-blinded clinical trial was conducted in fourteen antenatal care health facilities in the North (Goma, Mwesso, Nyiragongo) and South Kivu (Bukavu-Panzi) provinces of the Democratic Republic of Congo from March 1, 2020, to June 30, 2021. A total of 1300 primigravid women not exceeding 16 weeks of gestation were randomised with a 1:1 ratio to either the supplemented (A) or control (B) group. Each pregnant woman (A) presenting for antenatal care received a single monthly dose of cholecalciferol (60,000 IU) orally for 6 months. The control group received no vitamin D supplementation or placebo. Serum 25(OH)D was measured at recruitment and at 34 weeks of gestation. Outcomes were assessed monthly until delivery.
resultsThe median maternal age was 21 years (14-40), while the median gestational age was 15 weeks (5.4-29.0). A significant reduction in the risk of preeclampsia [RR = 0.36 (0.19-0.69); p = 0.001] and preterm delivery [RR = 0.5 (0.32-0.78); p = 0.002] was observed in the intervention group. An RR of 0.43 [(0.27-0.67); p < 0.001] was found for low birth weight. The RR for caesarean section was 0.63 [(0.52-0.75); p < 0.001]. The APGAR score at the 5th minute (p = 0.021) and the size of the newborn were significantly higher in the supplemented group (p = 0.005).
conclusionA single monthly dose (60,000 IU) of vitamin D supplementation, started in earlypregnancy, significantly reduced the incidence of preeclampsia and its maternal and foetal complications.
trial registrationISRCTN Register with ISRCTN46539495 on 17 November 2020.
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