Vitamin D deficiency and insufficiency in pregnant women: a longitudinal study

Valerie A. Holmes, Maria S. Barnes, H. Denis Alexander, Peter McFaul, Julie Wallace

Research output: Contribution to journalArticle

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Abstract

Maternal vitamin D insufficiency is associated with childhood rickets and longer-term problems including schizophrenia and type I diabetes. Whilst maternal vitamin D insufficiency is common in mothers with highly pigmented skin, little is known about vitamin D status of Caucasian pregnant women. The aim was to investigate vitamin D status in healthy Caucasian pregnant women and a group of age-matched non-pregnant controls living at 54-55 degrees N. In a longitudinal study, plasma 25-hydroxyvitamin D (25(OH)D) was assessed in ninety-nine pregnant women at 12, 20 and 35 weeks of gestation, and in thirty-eight non-pregnant women sampled concurrently. Plasma 25(OH)D concentrations were lower in pregnant women compared to non-pregnant women (P<0.0001). Of the pregnant women, 35, 44 and 16% were classified as vitamin D deficient (25(OH)D < 25 nmol/l), and 96, 96 and 75% were classified as vitamin D insufficient (25(OH)D < 50 nmol/l) at 12, 20 and 35 weeks gestation, respectively. Vitamin D status was higher in pregnant women who reported taking multivitamin supplements at 12 (P<0.0001), 20 (P=0.001) and 35 (P=0.001) weeks gestation than in non-supplement users. Vitamin D insufficiency is evident in pregnant women living at 54-55 degrees N. Women reporting use of vitamin D-containing supplements had higher vitamin D status, however, vitamin D insufficiency was still evident even in the face of supplement use. Given the potential consequences of hypovitaminosis D on health outcomes, vitamin D supplementation, perhaps at higher doses than currently available, is needed to improve maternal vitamin D nutriture.
LanguageEnglish
Pages876-881
JournalBRITISH JOURNAL OF NUTRITION
Volume102
Issue number6
DOIs
Publication statusPublished - Sep 2009

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Vitamin D Deficiency
Vitamin D
Longitudinal Studies
Pregnant Women
Mothers
Pregnancy
Rickets
Type 1 Diabetes Mellitus
Schizophrenia

Cite this

Holmes, Valerie A. ; Barnes, Maria S. ; Alexander, H. Denis ; McFaul, Peter ; Wallace, Julie. / Vitamin D deficiency and insufficiency in pregnant women: a longitudinal study. In: BRITISH JOURNAL OF NUTRITION. 2009 ; Vol. 102, No. 6. pp. 876-881.
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Vitamin D deficiency and insufficiency in pregnant women: a longitudinal study. / Holmes, Valerie A.; Barnes, Maria S.; Alexander, H. Denis; McFaul, Peter; Wallace, Julie.

In: BRITISH JOURNAL OF NUTRITION, Vol. 102, No. 6, 09.2009, p. 876-881.

Research output: Contribution to journalArticle

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