A condition occurring in infants born after 42 weeks’ gestation who exhibit signs of perinatal compromise related to diminished intrauterine oxygenation and nutrition secondary to placental insufficiency. During labor the fetal monitor may display late decelerations, and fetal hypoxia may result in meconium expulsion and aspiration. Characteristic assessment findings include skin desquamation and an absence of lanugo and vernix caseosa. Laboratory findings may include polycythemia and hypoglycemia. Postmature infants may also be at increased risk of cold stress due to diminished subcutaneous fat.