Table 1

 Testosterone levels in experimental groups.

Experimental groupTestosterone treatment (ng/ml) Mean (SE)Testosterone level
*Mean Te values on day 4 after intramuscular injection of 500 ng Te. Males and females were injected with the same doses every eighth day during the whole experiment.
Te, testosterone.
Control malesNone3.42 (0.58)
Castrated malesNone0.12 (0.02)
Castrated males + Te500 ng Te weekly3.49 (0.36)*
Control femalesNone0.09 (0.02)
Females + Te500 ng Te weekly2.64 (0.24)*