Figure 4. Plot of time course of sperm output (expressed as sperm density in millions of sperm per mL) before and after implantation of two 200-mg testosterone pellets (400 mg total; closed circles), four 200-mg testosterone pellets (800 mg total; closed squares), four testosterone pellets plus depot progestin (800 mg total testosterone plus 300 mg DMPA; closed diamonds) and six 200 mg testosterone pellets mg (1200 mg total; open hexagons) in healthy fertile men (262). Results expressed as the mean and SEM. Note the cube root transformed scale on the y-axis.