This book is actually three books published as one volume for what may be the first time. This is the story of the Spanish princess Katherine of Aragon and it's beautiful, tragic and stirring. Katherine was the daughter of Queen Isabella of Spain.
As a result, a form of vitamin K deficiency, called hemorrhagic disease of the newborn, may develop. This disease involves spontaneous bleeding beneath the skin or elsewhere in the infant's body, and occurs in about 1% of all infants.
For several decades, the vitamin K-deficient chick model was the only method of quantifying vitamin K in various foods: the chicks were made vitamin K-deficient and subsequently fed with known amounts of vitamin K-containing food. The extent to which blood coagulation was restored by the diet was taken as a measure for its vitamin K content.