PEDIATRICS Vol. 79 No. 5 May 1987, pp. 702-705
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Postnatal Weight Changes in Low Birth Weight Infants

Stanley G. Shaffer MD1, Cheryl L. Quimiro 1, John V. Anderson MD1, and Robert T. Hall MD1

1 From the Children's Mercy Hospital, University of Missouri Kansas City School of Medicine, Kansas City

Postnatal body weight changes were assessed in 385 surviving infants with birth weights of less than 2,500 g. Body weight was measured daily between birth and 45 days of age. Infants were grouped according to 100-g birth weight categories, and mean body weight changes for each group were compared. Initial postnatal weight loss occurred in each group and ranged between 7.9% and 14.6% of birth weight. Mean postnatal weight loss was greater in the lowest birth weight groups, but considerable variability was observed among individual infants. Duration of postnatal weight loss was similar among all birth weight groups. Weight gain usually began between four and six days of age, and the rate of weight gain expressed as grams per kilogram per day was similar in all birth weight groups.

Key Words: low birth weight infant • growth

Submitted on February 26, 1986
Accepted on June 10, 1986




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