The Neonatal Hemorrhagic Risk Assessment in Thrombocytopenia

Inclusion Criteria: * Have a gestational age \<32 weeks and a birth weight ≥500 grams; * Have a platelet count \<100 x 109/L; and * Have a parent/guardian willing to provide written informed consent. Exclusion Criteria: * Are not expected to survive for \>24 hours by the Attending Neonatologist; * Are thought to have a familial thrombocytopenia or platelet dysfunction, based on family history or clinical presentation (associated congenital malformations, platelet morphology).