KITLG and Infertility: Based on various reports,KITLG/KIT-receptor represent one of the key regulatorsof testicular formation, development andfunction since its impairment has been observedin gonadal pathologies including testicular developmentaldefects, infertility and testicular cancer.Downregulation of KITLG/KIT-receptor has beenalso observed in oligozoospermia/azoospermia,which is associated with an increase in the germcell apoptosis process (35, 36).