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Bone Mineralization and Mineral Homeostasis in Very Low‐Birth-Weight Infants Fed Either Human Milk or Fortified Human Milk

John M. Pettifor,Rashid Rajah,A. Venter,Gopal P. Moodley,L. Opperman,M. Cavaleros,F. P. Ross

Published 1989 in Journal of Pediatric Gastroenterology and Nutrition - JPGN

ABSTRACT

Abnormalities in bone mineral metabolism are frequently found in very low-birth-weight infants, especially if fed breast milk. To assess the efficacy of a breast-milk fortifier in the feeding of these very small infants, very low-birth-weight babies (between 1,000 g-1,500 g at birth) were randomly assigned to one of two groups on day 4 of life. The fortified group received the fortifier mixed in equal proportions with their own mother's milk, while the breast-milk group received only their own mother's milk. All infants received an oral vitamin D supplement of 750 IU/day. The study was continued until the infants weighed 1,800 g, at which stage breast feeding was encouraged. Thirty infants in the breast-milk group and 29 in the fortified group completed the study. Infants in the fortified group had significantly lower alkaline phosphatase values, a greater bone mineral content (BMC) and BMC/bone width ratio, and lower urinary calcium excretion than the breast-milk group at a weight of 1,800 g. At follow-up study 3 months after delivery, when most of the infants in both groups had been breast fed for at least 6 weeks, the breast-milk group's biochemical and BMC abnormalities were almost totally corrected and were now similar to those of the fortified group. Thus, the addition of the fortifier to breast milk during the first 4–6 weeks of life decreased the biochemical evidence of abnormal bone mineral homeostasis and increased BMC in very low-birth-weight infants. By 3 months of age, however, the breast-milk group had almost totally corrected its abnormalities.

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