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Median weight gain patterns of the 23–25 (red dot), 26–28 (blue dash), and 29–31 (purple dash dot) week Prem Growth study preterm infants with the Fetal-Infant Growth Reference 2013, which was based on a 6 country meta-analysis of intrauterine growth (22 to 40 weeks) and the World Health Organization Growth Standard (40 to 50 weeks) (3rd, 50th & 97th percentiles).
