A mathematical model describing the biochemical interactions of the luteinizing hormone LH), luteinizing hormone-releasing hormone (LHRH), and testosterone (T) is presented. The model structure consists of a negative feedback mechanism with transportation and secretion delays of different hormones. A comparison of stability and bifurcation analysis in the presence and absence of delays has been performed. Mathematical implications of castration and testosterone infusion are also studied. © Hindawi Publishing Corp.