Normal Specific Gravity of Urine in Children

Understanding Urine Specific Gravity in Children

• The American Academy of Child and Adolescent Psychiatry suggests that first-morning urine specific gravity should be 1.025 or higher after overnight fluid restriction, serving as a useful screening measurement of renal concentrating ability 1
• Early-morning unconcentrated urine with specific gravity less than 1.015 has been proposed as a potential marker to distinguish between enuretic and non-enuretic children, with some studies finding significantly lower morning urine specific gravity in children with enuresis compared to controls 1
• The normal specific gravity of urine in children is typically between 1.015 and 1.025 in the first morning void, with values less than 1.015 potentially indicating dilute urine that may be associated with conditions such as enuresis 1, 2