Bacteria that synthesize vitamin K are not present in the newborn's intestinal tract, and it promotes normal clotting factors to develop sooner.

Most mothers have a diet deficient in vitamin K, which results in the infant being deficient.

Vitamin K prevents the synthesis of prothrombin in the liver and must be given by injection.

The supply of vitamin K is inadequate for at least 3 to 4 months, and the newborn must be supplemented.