T. TanutpanitP. PongsumpunI. M. TangKing Mongkut's Institute of Technology LadkrabangMahidol University2018-10-192018-10-192013-11-04International Journal of Mathematics and Computers in Simulation. Vol.7, No.4 (2013), 355-362199801592-s2.0-84886709539https://repository.li.mahidol.ac.th/handle/123456789/31610In this paper, we develop the mathematical model with a time delay to describe the feedback mechanisms concerning of cyclicity of the male hormonal balance on the influence of variations in the sex hormone-binding globulin (SHBG) concentration. We show that a Hopf bifurcation occurs when a time delay τ passes through a critical value. Numerical simulations are performed to illustrate the analytical results. Moreover, this model can explain the pulsatile secretion of hormones in male.Mahidol UniversityComputer ScienceMathematicsArticleSCOPUS