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. 2017 Sep 26;14(10):1121.
doi: 10.3390/ijerph14101121.

Vitamin D Concentration in Maternal and Umbilical Cord Blood by Season

Regina Wierzejska  1 , Mirosław Jarosz  2 , Włodzimierz Sawicki  3 , Michał Bachanek  4 , Magdalena Siuba-Strzelińska  5
Affiliations

Vitamin D Concentration in Maternal and Umbilical Cord Blood by Season

Regina Wierzejska et al. Int J Environ Res Public Health. .

Abstract

Summer is generally considered to be the season when the body is well-supplied with vitamin D. The aim of this study was to compare maternal and umbilical cord blood concentrations of vitamin D during two extreme seasons of the year in Poland-winter and summer. A total of 100 pregnant women with no history of chronic diseases before pregnancy were included in the study. Pre-delivery maternal venous blood and neonatal cord blood samples were collected and total 25(OH)D concentration was measured. Data on vitamin D consumption (collected with the use of Food Frequency Questionnaire) and lifestyle factors were taken. Both, maternal and umbilical cord blood concentrations of vitamin D were higher in the summer group as compared to the winter group (mean 22.2 ± 6.5 ng/mL vs. 16.5 ± 8.2 ng/mL (p < 0.001), respectively for the mothers and 31.3 ± 9.4 ng/mL vs. 22.7 ± 11.0 ng/mL (p < 0.0001), respectively for the neonates). However, only 16% of the pregnant women reached the optimal vitamin D concentration during summer. Therefore, summer improves the levels of vitamin D in the body but does not guarantee the recommended concentration and supplementation throughout the whole year is essential.

Keywords: blood; newborn; pregnant women; season; vitamin D.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Distribution of vitamin D concentration in the blood.
Figure 2
Figure 2
Vitamin D concentration in the mother-infant blood sets by season (ascending order).
Figure 3
Figure 3
Receiver operating characteristic (ROC) curve for the dependence between maternal levels and optimal neonatal levels.
See this image and copyright information in PMC

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