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Changes in the plasma Se concentration (ppb) relative to parturition (mean±standard error of the mean; −Se: n = 17, +Se: n = 17). Blood sampling from the jugular vein was carried out in the morning on –30 d, 0 d, 30 d, 60 d, 90 d, and 100 d after delivery. The Se concentrations of blood plasma was analyzed using an atomic absorption spectrophotometer. Significant difference according to the Bonferroni method was defined as a p value of <0.05 (*).
