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Plasma circulating levels (means ± SE) of IGF-1 from northern elephant seal pups before (0) and 60 and 120 min and 24 h after TSH infusion in early fasted (n = 6; 2–3 wk after weaning) and late fasted (n = 6; 6–8 wk after weaning) elephant seal pups. #Significant (P < 0.05) difference from 2 to 3 wk after weaning. *Significant (P < 0.05) difference from T0 within a group.
