Figure 4: Effect of high-frequency electroacupuncture treatment on intromission frequency (a) and ejaculation frequency (b) in the male rats. The data are presented as mean ± standard error of the mean for pre-treatment and Day 2. On ejaculation frequency (b), a represents the significant difference (***P < 0.001) between control group and EA group at Day 2, while b indicates the significant difference (*P < 0.05) between Pre-T and Day 2 of EA treated group. EA: Electroacupuncture at Guanyuan (CV4) and Zhongji (CV3) with high-frequency (80 Hz) electrical stimulation. Pre-T: pre-treatment.