The invention relates to a novel agent having an influence on the genital, sexual and reproductive function of mammals and human beings. More specifically, the invention relates to the use of a heptapeptide of the general formula (I) Thr-Lys-Pro-Arg-Pro-Gly-Pro as a stimulator of the genital, sexual and reproductive function of mammals and human beings. The invention widens the range of agents available for stimulating the genital, sexual and reproductive function of mammals and human beings.