<prompt> The feature of hemorrhagic disease of the new born is -Prolonged prothrombin timeDefective platelet countDecreased bleeding timeProlonged thrombin time  <response>: Ans. is a Prolonged prothrombin time Hemorrhagic disease of the newborn. It is caused by a deficiency of vitamin K dependent factors II, VII, IX, X. Bleeding occurs in 0.25-1.7 of newborns who do not receive vitamin K prophylaxis after birth. Symptoms - Sites of ecchymoses and surface bleeding include - Gastrointestinal tract Umbilical cord Circumcision site Nose Sometimes intracranial hemorrhage can occur. Laboratory features of hemorrhagic disease of new bom : Platelet count -Normal Prothrombin time -Prolonged Thrombin time -Normal until very late in the disease Fibrinogen -Normal Factor V -Normal 