Season, dietary factors, and physical activity modify 25-hydroxyvitamin D concentration during pregnancy

Purpose The objectives of this cross-sectional study were to define maternal and umbilical cord blood (UCB) 25-hydroxyvitamin D (25(OH)D) to characterize maternal factors modifying 25(OH)D during pregnancy and predict UCB 25(OH)D in two subgroups with Declined [Δ25(OH)D 0 nmol/l] 25(OH)D concentration.