The effect of SPT, TT100, TT50, SPT+TT100, and SPT+TT50 on testes weight (g) after 10 weeks of treatment of male pigeons (Columba livia domestica) (n=5) under a long photoperiod ((19L:5D). For SPT treatment, administration of TT and statistical detail, see Figure 1. SPT provoked a decrease in testes weight. However, methanolic extract of TT could improve significantly the testes weight.