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Concentrations of testosterone (A) and 17β-estradiol (B) in venous plasma collected post-anesthetic induction, prior to scaled cortical impact in male and female pigs 5–7 days, 1 month, or 4 months old. a,bMeans ± SEM with different letters differ significantly (p < 0.05). Infant males (5–7 days old) had significantly higher (p < 0.0001) concentrations of testosterone and 17β-estradiol than their female counterparts and 1-month-old and 4-month-old subjects.
