Figure 9From: Possible mechanism underlying the effect of Heshouwuyin, a tonifying kidney herb, on sperm quality in aging rats Concentration of Leydig cell testosterone in different experimental groups. NCG: normal control group; SWYC: Heshouwuyin control group; AG: aging group; SWPG: Shouwu pill group; SWYG: Heshouwuyin group. Each histogram represents the mean ± SD of the values for 5 rats. Columns with different letters represent statistically different values, while same letters indicates no significant difference.Back to article page