Coagulation abnormalities are common among preterm babies and could be reflective of underlying disease processes but are fraught with pitfalls. The interpretation of coagulation profile in newborn infants needs consideration of gestational age, postnatal age and the state of wellbeing of the neonate.1 Previous studies have shown that adult reference ranges for coagulation screening tests, especially prothrombin time (PT) and activated partial thromboplastin time (APTT) cannot be applied to newborns and young infants.2 The normal haematological ranges for term and preterm babies …