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Fig. 7 | Biology of Sex Differences

Fig. 7

From: Ischemia and reperfusion injury following cardioplegic arrest is attenuated by age and testosterone deficiency in male but not female mice

Fig. 7

Comparison of serum testosterone levels in young and old mice of both sexes. Serum testosterone concentrations were significantly lower in old males compared to young males. Testosterone levels were low in females regardless of age. Data were analyzed with two-way ANOVA, with age and sex as main factors. Values are expressed as the mean ± SEM. The asterisk denotes significantly different from young male (p < 0.05) and the number sign denotes significantly different from young female (p < 0.05); the Holm-Sidak post hoc test was used. Detailed statistical analysis is presented in Additional file 1: Table S1. Young male, n = 3; old male, n = 4; young female, n = 3; old female, n = 5

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