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Plasma cortisol concentrations in low (•) and high (○) BW pigs prior to and following ACTH administration (2.0 µg (kg body weight)−1; i.v.) at time 0 min (arrow) at 3 (A) and 12 (B) months of age. At 3 months of age, cortisol concentrations in low BW pigs were significantly (P < 0.005) greater than in high BW pigs (* 2-way ANOVA).
