Maternal vitamin D status, its associated factors and the course of pregnancy in Thai women
- 11 December 2012
- journal article
- Published by Wiley in Clinical Endocrinology
- Vol. 78 (1), 126-133
- https://doi.org/10.1111/j.1365-2265.2012.04470.x
Abstract
There are limited data on the prevalence of vitamin D inadequacy in pregnant women living in Southeast Asia and changes in their vitamin D status during pregnancy. To determine the prevalence of vitamin D inadequacy, its predictive factors and the changes in vitamin D status during the course of pregnancy. A prospective study of 120 pregnant Thai women with gestational age <14 weeks. Serum 25 hydroxyvitamin D (25OHD) and clinical data were obtained at the first visit, in the second and third trimesters of pregnancy. Vitamin D inadequacy was defined as 25OHD <75 nm. The prevalences of vitamin D inadequacy were 83.3%, 30.9% and 27.4% for the first, second and third trimesters. The independent predictors of vitamin D inadequacy in the third trimester were not drinking vitamin-fortified milk (OR 11.42; 95% CI: 3.12-41.86), not taking prenatal vitamins (OR 9.70; 95% CI: 2.28-41.19) and having vitamin D deficiency in the first trimester (OR 10.58; 95% CI: 2.89-38.80). Vitamin D deficiency was not found in women taking prenatal vitamins. However, 20 women who took at least 400 IU/day of vitamin D from prenatal vitamins still had vitamin D insufficiency in the third trimester. Vitamin D inadequacy is common in pregnant Thai women, especially in the first trimester. Vitamin D supplementation may be needed prior to conception and during pregnancy. For areas with abundant sun exposure like Thailand, vitamin D supplementation at 400 IU/day is likely to prevent vitamin D deficiency, but is inadequate to prevent vitamin D insufficiency even at 800 IU/day.Keywords
This publication has 30 references indexed in Scilit:
- Vitamin D in Pregnancy and Lactation in HumansAnnual Review of Nutrition, 2011
- Vitamin D deficiency and pregnancy: From preconception to birthMolecular Nutrition & Food Research, 2010
- Vitamin D inadequacy in pregnancy: biology, outcomes, and interventionsNutrition Reviews, 2010
- Implications of vitamin D deficiency in pregnancy and lactationAmerican Journal of Obstetrics and Gynecology, 2010
- Vitamin D deficiency during pregnancy may impair maternal and fetal outcomesMedical Hypotheses, 2010
- Association between Vitamin D Deficiency and Primary Cesarean SectionJournal of Clinical Endocrinology & Metabolism, 2009
- The vitamin D deficiency pandemic and consequences for nonskeletal health: Mechanisms of actionMolecular Aspects of Medicine, 2008
- Maternal Plasma 25-Hydroxyvitamin D Concentrations and the Risk for Gestational Diabetes MellitusPLOS ONE, 2008
- Maternal Vitamin D Deficiency Increases the Risk of PreeclampsiaJournal of Clinical Endocrinology & Metabolism, 2007
- Maternal 25-Hydroxyvitamin D and Parathyroid Hormone Concentrations and Offspring Birth SizeJournal of Clinical Endocrinology & Metabolism, 2006