This behaviour can be paralleled to those observed in tumor cells where their growth is limited by the finite space in which cells are confined and by the availability of nutrients, as modelled by the Gompertz curve [38]:where X(t) represents the number of GnRH-R, X(0) the receptor number at the starting observation time (here normalized to one), K the maximum number of receptors that can be expressed on the cell surface and α a constant characterizing the increase rate of GnRH-R. Here, GNRHR is linked to neoplasm.