Vitamin D Concentration in Maternal and Umbilical Cord Blood by Season

Regina Wierzejska, Mirosław Jarosz, Włodzimierz Sawicki, Michał Bachanek and Magdalena Siuba-Strzelińska
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Regina Wierzejska: Department of Nutrition and Dietetics, Clinic of Metabolic Diseases and Gastroenterology, Institute of Food and Nutrition, 02-903 Warsaw, Poland
Mirosław Jarosz: Department of Nutrition and Dietetics, Clinic of Metabolic Diseases and Gastroenterology, Institute of Food and Nutrition, 02-903 Warsaw, Poland
Włodzimierz Sawicki: Clinic of Obstetrics, Gynecology and Oncology, 2nd Faculty of Medicine, Medical University of Warsaw, 03-242 Warsaw, Poland
Michał Bachanek: Clinic of Obstetrics, Gynecology and Oncology, 2nd Faculty of Medicine, Medical University of Warsaw, 03-242 Warsaw, Poland
Magdalena Siuba-Strzelińska: Department of Nutrition and Dietetics, Clinic of Metabolic Diseases and Gastroenterology, Institute of Food and Nutrition, 02-903 Warsaw, Poland

IJERPH, 2017, vol. 14, issue 10, 1-10

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: vitamin D; blood; pregnant women; newborn; season (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
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