Erre radicals in cigarette smoke was known could promote infertility. Fee radicals activity can be inhibited by antioxidant in black seed (thymoquinane, nogelllone, carvvacrol, t-anethole, and 4 terpineol). The aim of this study was to assess the effect of black seed extract on MDA concentration in testis and spermatogonium cell number in subacute nonfilter-tipped cigarette smoke exposed rats. …