Figure 4. The direct effect of HEE of C. pulcherrima leaves on the percentage of hypoosmotic swelled sperm of (A) human and (B) rat at different concentrations for different incubation periods. 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.