Human Phenotype Ontology entry HP_0030748 (Grade I preterm intraventricular hemorrhage) is intraventricular hemorrhage that occurs in a preterm infant and that is restricted to subependymal region/germline matrix which is seen in the caudothalamic groove. Also known as: Germinal matrix haemorrhage, Germinal matrix hemorrhage, Grade I preterm intraventricular haemorrhage.