Problem: In a child with arginine vasopressin deficiency (diabetes insipidus), which characteristic would most likely be present in the child's health history? Need Assignment Help? vomiting early in the morning, headache, and decreased thirst delayed closure of the fontanels (fontanelles), coarse hair, and hypoglycemia in the morning gradual onset of personality changes, lethargy, and blurred vision abrupt onset of polyuria, nocturia, and polydipsia