Section 1. Foreword. Water flux and amniotic fluid volume: understanding fetal water flow -- Body composition of fetus and newborn -- Potassium metabolism -- Section B. Renal aspects of sodium metabolism in the fetus and neonate -- Perinatal calcium and phosphorus metabolism -- Acid-base homeostasis in the fetus -- Section C. Glomerular filtration rate in neonates -- Section D. Renal development and molecular pathogenesis of renal dysplasia -- The developing kidney and the fetal origins of adult cardiovascular disease -- Fluid and electrolyte management of high risk infants -- Renal modulation: the renin-angiotensin-aldosterone system -- Renal modulation: arginine vasopressin and atrial natriuretic peptide -- Acute problems of prematurity: balancing fluid volume and electrolyte replacements in very low birth weight and extremely low birth weight neonates -- Lung fluid balance in developing lungs and its role in neonatal transition - Use of diuretics in the newborn -- Neonatal hypertension: diagnosis and management -- Edema -- Kidney injury in the neonate -- Hereditary tubulopathies -- Inherited disorders of calcium, phosphate and magnesium.