When diagnosed in the neonatal period and treated adequately, infants homozygous for muta- tions at the PAH locus grow up with near normal cognitive function. However, evaluation of the first generation of patients with PKU to reach adulthood

OF ORIGINAL ARTICLE. Data on the birth weights of 5,635 live-born Caucasian infants at 24 to 42 weeks’ gestation are presented. All infants were born from July 1948 to January 1961. Data from infants born at greater than 36 weeks’ gestation after 1955 are excluded because of the large number of infants. The socioeconomic stratum represented by this population is defined as medically indigent or part-pay. The median weights of Colorado babies (3230 g) were found to be lower at 40 weeks’ gestation that the national median (3340 g). Weight curves in the form of percentiles are generated from the data. These curves can be used as standards for From the Department of Pediatrics, University of Wisconsin, Madison, Wisconsin. Received for publication Mar 19, 1998; accepted Mar 19, 1998. Address correspondence to: Frank R. Greer, MD, Wisconsin Perinatal Center, Meriter Hospital, 202 S Park St, Madison, WI 53715. PEDIATRICS (ISSN 0031 4005). Copyright © 1998 by the American Academy of Pediatrics.