Intracranial hemorrhage: late onset in the preterm neonate.

Neonatal intracranial hemorrhages usually occur during the first week of life. Late intracranial hemorrhages have rarely been reported. Seventeen infants were identified whose hemorrhages occurred after the first postpartum week. The latest hemorrhage occurred eight weeks postpartum. Most of the hemorrhages were small and restricted to the region of the germinal matrix. Sixteen of the infants were premature, with an estimated postconceptual age at the time of hemorrhage of 33 weeks or less.