[Macrosomic infants: clinical problems at birth and afterward].

Macrosomic infants (birth weight >4000 g) show increased risk for shoulder dystocia and associated injuries, hypoglycemia and respiratory distress. Higher risk is directly related to neonatal birth weight. High birth weight is also associated with increased risk of developing metabolic syndrome later in life. However the relation between birth weight and later-life metabolic syndrome in not linear, but "U" shaped.