Immediately after birth, your baby will get 1 milligram of vitamin K to improve the blood clotting. This is sufficient for the first week. When you breast feed, you have to give your child vitamin K every day from the eighth day until three months after birth. Vitamin K is given to prevent (cerebral) bleeding, as the newborn does not get a vitamin K stock from the mother and is unable to make enough itself. If you do not breastfeed and your child receives full bottle feeding, no extra vitamin K is necessary, because this is added to the bottle feeding.