Gestational vitamin D supplementation and sun exposure significantly influence cord blood vitamin D status and 3-epi-25-hydroxyvitamin D levels in term newborns.

Background And Aims: High prevalence of hypovitaminosis D is worldwide reported among pregnant women and newborns. We assessed cord blood 25-hydroxyvitamin D [25(OH)D] and 3-epi-25-hydroxyvitamin D (C-epimer) levels in relation to assumed maternal risk factors for hypovitaminosis D.

Methods: We enrolled 246 term newborns during summer.