Why do children pass urine until 15 to 16 years of age?

Children continue to pass urine until 15 to 16 years of age due to ongoing growth and development, which includes the maturation of their kidneys and urinary system. The production of urine is a normal physiological process that helps regulate bodily fluids and electrolytes. Additionally, as children grow, their bladder capacity increases, but the frequency of urination may still reflect their overall hydration levels and metabolic needs. This process is typically well-regulated, and by adolescence, most individuals have developed a consistent pattern of urinary function.