Seminiferous tubular diameter (µm) (A) and epithelium height (µm) (B) after 2, 4, 6, 8, 10 and 12 days of alone kisspeptin treatment (10ρg, 1ηg, 1µg doses). Kisspeptin (1µg) significantly decreased epithelium height after 8, 10 and 12 days treatment, 1ηg dose significantly decreased epithelium height after 12 days treatment while no effect was observed with 10ρg dose. Values are expressed as mean ± SE (n=7). **p< 0.01, ***p< 0.001.