The nurse is teaching parents of a newborn about feeding their infant.

Parents must be careful when warming bottles in a microwave oven because the milk can become superheated.

When a microwave oven is used, the defrost setting should be chosen, and the temperature of the formula should

be checked before giving it to the baby. Refrigerated, partially used bottles should be discarded after 4 hours

because the baby might have introduced some pathogens into the formula. Returning the bottle to the refrigerator

does not destroy pathogens. Formula concentrate and water are usually mixed in a 1:1 ratio of one part concentrate

and one part water. Infants should be offered fresh formula at each feeding. Partially used bottles should not have

fresh formula added to them. Pathogens can grow in partially used bottles of formula and be transferred to the new

formula.Health Promotion and Maintenance