There are a number of ELISA Kits available for the measurement of GnRHa, another term for the human protein, gonadotropin releasing hormone 1. Other synonyms may include: progonadoliberin-1, GnRH-associated peptide 1, gonadotropin-releasing hormone 1 (luteinizing-releasing hormone), leuteinizing-releasing hormone, prolactin release-inhibiting factor, GNRH, and GRH. It is encoded by the GNRH1 gene to yield a protein 92 amino acids in length and 10.4 kDa in size. The protein is categorized into the GnRH family. Versions of GnRHa are present in other organisms, including: Mouse, Rat, Frog, Chicken.