Figure 3. The direct effect of HEE of C. pulcherrima leaves on the percentage of viable sperm of (A) human and (B) rat in concentration and duration-dependent manner. Bars and points were expressed as mean±SEM (n=16). ANOVA followed by “Multiple-comparison Student’s two-tail ‘t’-test.” Bars and points with different superscripts (a-f) differ from each other significantly, p<0.05.