Use 24 kcal per ounce preterm formula until infant weighs 1,800 to 3,500 g (63.49 to 123.46 oz); usually inpatient only

Use 22 kcal per ounce preterm enriched formula until catch-up growth obtained or one year adjusted age

Continue 20 kcal per ounce standard formula once catch-up growth achieved until one year adjusted age

Formula can be concentrated if needed to increase caloric intake

Formulas providing 2 mg per kg of iron per day may need to be supplemented with an additional 2 mg per kg per day (maximal dose of 15 mg per day) depending on degree of prematurity

Vitamin supplements not necessary if formula meeting needs for growth