Figure 8From: Understanding spermatogenesis is a prerequisite for treatmentIntrinsic regulation of gametogensis. On the left a section of the germinal epithelium with basal lamina propria and below a cluster of Leydig cells surrounding a capillary are outlined. Arrows indicate different influences of secreted hormones and growth factors. On the right the main processes of spermatogenesis are correlated to regulatory processes.Back to article page