You, or your child’s attending physician will decide ultimately what tests are suitable. Typically, a full liver function panel, gamma-glutamyl transferase (GGT or GPT) test, blood ammonia levels, and a full amino acid profile will be ordered. An alpha-fetoprotein (AFP) test will also be requested for neonates until they have outgrown the NICCD period. Some physicians may also check for bile acid, serum lipid, and blood glucose levels.