Figure 2: Effect of Panax ginseng treatment on CatSper messenger ribonucleic acids levels in mouse testes as determined by real-time polymerase chain reaction. Normal and P. ginseng-treated (100, 500 and 1000 mg kg−1 ) groups. (a) CatSper1; (b) CatSper2; (c) CatSper3 and (d) CatSper4. Each column represents the mean } standard deviation (n = 3). The normal group was used as the control (relative quantity, RQ = 1). *Significantly different from the vehicle-treated group (*P < 0.05, **P < 0.01 and ***P < 0.001).