Luteinizing Hormone Releasing Hormone (LH-RH, GnRH) is a hypothalamic peptide hormone that stimulates the production and release of follicle-stimulationg hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary, subsequently initiating and maintainining reproductive organ functions. Agonist of the gonadotropin-releasing hormone receptor (GnRHR).