Gonadorelin bodybuilding overview Gonadorelin bodybuilding is a synthetic form of the gonadotropin-releasing hormone (GnRH) that stimulates the production of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the pituitary gland. This leads to an increase in testosterone production in males and estrogen production in females. In bodybuilding, gonadorelin is mainly used as a post-cycle therapy (PCT) to restore natural testosterone production …