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Glucose tolerance in rats aged 6 and 14 weeks. Intraperitoneal glucose tolerance test (IPGTT) at 6 weeks (a) and 14 weeks (b) in rats from normal litters (NL, □) and small litters (SL, ○). Comparison of the area under the curve (AUC) (c) between NL (open bar) and SL (closed bar) rats at each time point. Results are expressed as mean ± S.E.M. (n = 5, 4 litters from each group). * P < 0.05, ** P < 0.01
