1. Biochem. a peptide hormone, produced by the hypothalamus, that stimulates the anterior lobe of the pituitary gland to secrete luteinizing hormone and follicle-stimulating hormone.
2. Pharm. a preparation of this hormone, used to treat precocious puberty, prostate cancer, male and female infertility, and female reproductive disorders. Abbr.: GnRH
Also, gonadotropin-releasing hormone .