6. Conditions associated with MR Hurler syndrome Encephalocele Down syndrome Metabolic Malformation Chromosomal Preconception and Periconception Meningitis Car accidents Kwashiokor Phenylketonuria Lead toxicity Infection Trauma Malnutrition Metabolic toxin postnatal Hypoxia hypoglycemia Prematurity metabolic Perinatal Chemicals Rubella Teratogen Infection Prenatal Examples Type of condition Period of development