IVH originates from the subependymal germinal matrix, a highly vascular structure of delicate capillaries. Around 50% occur with the first 24 hours of life, especially if unstable after birth, with less than 5% occurring after day 5.
Reference: Linder, N., Haskin, O., Levit, O., et al., 2003. Risk Factors for Intraventricualr Hemorrhage in Very Low Birth Weight Premature Infants: A Retrospective Case-Control Study. Pediatrics; 11(5): e590-e595.
Previously published: 20/02/14, 28/11/14