Abstract
ObjectiveTo determine the prevalence of vitamin B12 deficiency and examine the associations between maternal and infant vitamin B12 and folate status in a cohort of healthy pregnant adolescents.DesignSerum vitamin B12 and folate concentrations were measured in pregnant adolescents at mid‐gestation, delivery, and in cord blood. Linear and binomial regression models were used to examine the associations between maternal and infant vitamin B12 and folate status.ResultsSerum vitamin B12 concentrations decreased significantly during pregnancy (p<0.0001) resulting in an increased prevalence of vitamin B12 deficiency (<148 pmol/L) from mid‐gestation (1.6%) to delivery (15.3%). At delivery, an additional 46.6% of mothers were vitamin B12 insufficient (<200 pmol/L). Maternal vitamin B12 concentrations (p<0.001) and vitamin B12 deficiency (p<0.001) at delivery were associated with infant B12 concentrations, with 1% of infants being vitamin B12 deficient at birth. Similarly, maternal folate concentrations at delivery (p<0.001) were associated with infant folate concentrations.ConclusionsMaternal vitamin B12 and folate status at delivery predicted infant vitamin B12 and folate status in healthy pregnant adolescents.Support or Funding InformationSupported by grants from the United States Department of Agriculture (USDA): USDA 2005‐35200‐15218 and USDA 2010‐34324‐20769; and the Division of Nutritional Sciences, Cornell University
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