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Serum testosterone levels (mean ± SEM) in male rats in the sex group (n = 12) and the control group (n = 10) collected two days before sex testing (baseline) and every other day during sex testing. There was a significant day effect (P<0.0005) as well as a significant day×treatment interaction (P<0.0005). Post-hoc tests indicated significant difference between sex and control groups on that specific day (*P<0.05).
