A nutritional deficiency disease that is characterized by easy bleeding due to an inability to form blood clots caused by vitamin K deficiency, occurs most commonly in newborns, and has_material_basis_in deficiency of vitamin K secondary to liver prematurity, lack of vitamin K in a breastmilk diet, largely sterile gut, malabsorption, diarrhea, chronic illness, menorrhagia, chronic kidney disease, and some medications.