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Updated: Dec 6, 2025

Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
Published on: June 28, 2024
Association between umbilical cord vitamin D levels and adverse neonatal outcomes
M Treiber1, F Mujezinović1, B Pečovnik Balon2
1University Clinic for Gynaecology and Perinatology, Maribor University Medical Centre, Maribor, Slovenia.
Insights
Low vitamin D in newborns is linked to serious health issues. This deficiency increases the risk of preterm birth, respiratory problems, and hospitalizations in the first year.
Area of Science:
- Neonatal Health
- Nutritional Biochemistry
- Public Health
Background:
- Vitamin D plays a crucial role in immune function and fetal development.
- Maternal vitamin D status significantly impacts neonatal vitamin D levels.
- Vitamin D deficiency is a prevalent global health concern, particularly in pregnant women and newborns.
Purpose of the Study:
- To examine the association between cord blood 25-hydroxyvitamin D [25(OH)D] levels and neonatal health outcomes.
- To investigate the relationship between cord blood 25(OH)D and the risk of infant hospitalization within the first year of life.
Main Methods:
- Prospective enrollment of 402 mother-infant pairs, categorized by season.
- Measurement of 25(OH)D serum concentrations in maternal-neonatal pairs at delivery using electrochemiluminescence immunoassay.
- Logistic regression analysis to estimate crude odds ratios (cOR) and 95% confidence intervals (CI).
Main Results:
- Eighteen percent of newborns exhibited severe vitamin D deficiency (<25 nmol/L).
- Severe cord blood vitamin D deficiency correlated with higher risks of preterm birth (cOR 3.6), neonatal respiratory distress syndrome (cOR 5.9), and hospitalization for acute respiratory infection (cOR 3.9) or gastroenterocolitis (cOR 5.2).
Conclusions:
- Cord blood vitamin D deficiency is a significant risk factor for adverse neonatal outcomes.
- Low vitamin D levels in newborns are associated with an increased likelihood of preterm birth and respiratory distress.
- Neonatal vitamin D deficiency is linked to a greater risk of hospitalization during the first year due to respiratory and gastrointestinal infections.
Objective:
We investigated the associations between cord blood concentration of 25-hydroxyvitamin D [25(OH)D], neonatal outcomes, and the risk of hospitalization during the first year of life.
Methods:
A total of 402 newborn infants and their mothers were prospectively enrolled and divided in four groups according to season of the year. We determined 25(OH)D serum concentrations from maternal-neonatal pairs at delivery by electrochemiluminescence immunoassay. Cut-offs at 25, 50, and 75 nmol/L defined vitamin D status, corresponding to deficiency, insufficiency, and sufficiency, respectively. Crude odds ratio (cOR) and 95% confidence intervals (CI) were estimated using logistic regression.
Results:
Vitamin D severe deficiency (i.e., <25 nmol/L) was present in 18% of newborns. Cord blood severe deficiency was associated with an increased risk of preterm birth (cOR 3.6, 95% CI: 1.1-12.2), neonatal respiratory distress syndrome (cOR 5.9, 95% CI: 1.1-33.2), and increased risk of hospitalization during the first year of life because of acute respiratory infection (cOR 3.9, 95% CI: 1.4-10.6) or acute gastroenterocolitis (cOR 5.2, 95% CI: 1.4-19.1).
Conclusion:
Cord blood vitamin D deficiency is associated with increased risk of preterm birth, neonatal respiratory distress syndrome, and hospitalization during the first year of life.
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