Research overview: GnRH agonist implants for reproductive suppression in felids

Gonadotropin-releasing hormone agonist implants offer a reversible method of suppressing reproduction in cats by downregulating the reproductive axis after an initial stimulation. This overview surveys the use of such agonist implants in felids for contraception and management, the mechanism by which sustained agonist exposure suppresses gonadotropin release, and the duration and reversibility of the effect. It reviews the initial stimulatory phase, the variability of response across individuals and species, and the appeal of a non-progestin option with potentially fewer reproductive tract side effects. The review connects agonist implants to population management and welfare. Understanding these implants clarifies a widely used tool for temporarily and reversibly controlling reproduction in captive cats.