Effect of Vitamin D in Diets of Preterm Infants

Inclusion Criteria

• •Born at 28 0/7 to 34 6/7 weeks PMA and 1000-2250 g birth weight.
• •Currently 34 0/7 to 38 6/7 weeks post-menstrual age at time of consent.
• •Born at Texas Children's (including Pavilion for Women) or Methodist campus hospitals or transferred within 48 hours of birth.
• •Care expected to be provided at one of these institutions until discharge home.
• •Any initial feeding will be permitted, but expected to transition to primarily (80% of feeds or up to 2 breast milk feeds per day) infant formula by 38 6/7 weeks PMA or hospital discharge, whichever comes first.
• •Able to tolerate 22 kcal/oz transitional formula and receive a volume of at least 130 mL/kg/day total feeding volume.
• •No longer receiving any form of mechanical ventilation or diuretics. Low flow nasal cannula (\< ¼ LPM) will be permitted if it is anticipated this will be discontinued before hospital discharge.