What is the most significant risk factor for clubfoot?

Choice A reason:

Infection is not prevented by vitamin K administration. Vitamin K is needed for blood clotting, not for fighting infections. Newborns are given vitamin K injections to prevent a serious disease called hemorrhagic disease of the newborn (HDN), which is caused by bleeding in the brain or other organs.

Choice B reason:

Hyperbilirubinemia is not prevented by vitamin K administration. Hyperbilirubinemia is a condition in which there is too much bilirubin in the blood, causing jaundice. Bilirubin is a yellow pigment that is produced when red blood cells break down. Vitamin K does not affect the production or breakdown of bilirubin.

Choice C reason:

Bleeding is prevented by vitamin K administration. Vitamin K is needed for the synthesis of several clotting factors that help stop bleeding when there is an injury. Newborns have very low levels of vitamin K in their bodies because they do not get enough from the placenta or breast milk, and they do not have enough bacteria in their intestines to produce it. This puts them at risk for VKDB, which can cause life-threatening bleeding in the brain or other organs.

Choice D reason:

Potassium deficiency is not prevented by vitamin K administration. Potassium is an electrolyte that is important for nerve and muscle function, as well as fluid balance. Vitamin K does not affect the absorption or excretion of potassium.

Choice A reason:

This is incorrect because formula-fed newborns typically have one or more stools per day, not every 3 days. Stooling less frequently than once a day may indicate constipation.

Choice B reason:

This is correct because breastfed newborns usually have two to three stools per day, which are soft and yellow. Breastfed babies may also have stools less frequently, even once every 10-14 days, as long as the stool is soft.

Choice C reason:

This is incorrect because newborns should be fed formula on demand, not on a strict schedule. The average feeding interval for formula-fed newborns is about 3 to 4 hours.

Choice D reason:

This is incorrect because newborns should be breastfed eight to 12 times per day, not five to seven times. Breastfeeding more frequently helps to establish milk supply and prevent engorgement. - Stanford Medicine.