Table 1 Testosterone levels in experimental groups.

Experimental group	Testosterone treatment	Testosterone level
		(ng/ml)
		Mean (SE)
Control males	None	3.42 (0.58)
Castrated males	None	0.12 (0.02)
Castrated males + Te	500 ng Te weekly	3.49 (0.36)*
Control females	None	0.09 (0.02)
Females + Te	500 ng Te weekly	2.64 (0.24)*

*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.