Thanapinyo A, et al. - Among 19 children born small for gestational age and 17 healthy controls (aged 6 to 14 years), researchers explored the connection between ambulatory blood pressure and urinary catecholamines during exposure to stress. Prior to and after exposure to stress, urinary catecholamines were collected including mathematical testing and venipuncture. Thereafter, ambulatory monitoring of blood pressure was performed to obtain profiles of 24-hour blood pressure. In children born small for gestational age, masked hypertension is not uncommon. In children born small for gestational age with masked hypertension, urinary norepinephrine levels were increased after stress. There has been no rise in urine norepinephrine levels in controls with masked hypertension.