Table 1. Average serum MDA levels in several treatment groups.

Groups	Serum MDA (mg/ml) ± St Dev
Control	29.25 ± 2.81a
Testosteron propionate	56.89 ± 5.35b
Estradiol valerate	22.01 ± 2.12a

Note: Various notations (^a,b) indicate significant treatment differences (p < 0.05).