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Table 4 Smoothed values of mean and standard deviation (SD) for length, weight and head circumference from birth to 2 years of age. Note: GA = 24 corresponds to 24 weeks+0 days etc as in the graphs.

From: Continuous growth reference from 24thweek of gestation to 24 months by gender

  Length (cm) Log10 [weight(kg)] Head circumference (cm)
  Boys Girls Boys Girls Boys Girls
Age Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD
Gestational age (weeks)
24 31.9 1.3 32.1 1.2 -0.165 0.064 -0.178 0.069 22.4 1.5 22.7 1.5
25 33.7 1.3 33.8 1.2 -0.092 0.063 -0.105 0.067 23.6 1.5 23.7 1.5
26 35.4 1.3 35.3 1.3 -0.023 0.062 -0.036 0.066 24.7 1.5 24.8 1.5
27 37.0 1.3 36.8 1.3 0.041 0.061 0.027 0.065 25.8 1.5 25.8 1.5
28 38.5 1.4 38.2 1.3 0.100 0.061 0.086 0.064 26.8 1.5 26.7 1.4
29 39.9 1.4 39.6 1.3 0.156 0.060 0.141 0.063 27.8 1.4 27.6 1.4
30 41.2 1.4 40.8 1.3 0.207 0.059 0.193 0.062 28.7 1.4 28.5 1.4
31 42.5 1.4 42.0 1.4 0.256 0.058 0.241 0.061 29.6 1.4 29.3 1.4
32 43.7 1.4 43.2 1.4 0.301 0.058 0.285 0.060 30.4 1.4 30.0 1.4
33 44.8 1.4 44.3 1.4 0.343 0.057 0.327 0.059 31.2 1.4 30.8 1.4
34 45.9 1.5 45.3 1.4 0.382 0.056 0.366 0.058 32.0 1.4 31.5 1.4
35 47.0 1.5 46.3 1.4 0.419 0.056 0.402 0.057 32.7 1.4 32.1 1.3
36 48.0 1.5 47.3 1.5 0.453 0.055 0.436 0.057 33.4 1.4 32.8 1.3
37 48.9 1.5 48.2 1.5 0.485 0.055 0.468 0.056 34.0 1.4 33.4 1.3
38 49.8 1.5 49.1 1.5 0.515 0.054 0.498 0.055 34.7 1.3 34.0 1.3
39 50.7 1.6 50.0 1.5 0.544 0.053 0.525 0.054 35.2 1.3 34.5 1.3
40 51.6 1.6 50.8 1.5 0.570 0.053 0.551 0.054 35.8 1.3 35.0 1.3
Age (months)
3 61.3 1.8 60.0 1.8 0.798 0.048 0.775 0.048 41.1 1.2 40.1 1.2
6 68.1 2.0 66.6 2.0 0.909 0.044 0.884 0.045 44.1 1.2 43.0 1.1
9 72.5 2.2 71.0 2.2 0.974 0.042 0.947 0.044 46.0 1.1 44.8 1.1
12 76.1 2.4 74.7 2.4 1.018 0.041 0.991 0.043 47.2 1.3 46.0 1.3
15 79.6 2.6 78.2 2.6 1.053 0.041 1.026 0.043 48.1 1.4 46.9 1.3
18 82.8 2.8 81.5 2.8 1.081 0.041 1.056 0.043 48.9 1.3 47.6 1.4
21 85.7 2.9 84.5 3.0 1.106 0.042 1.082 0.043 49.5 1.3 48.2 1.3
24 88.3 3.1 87.2 3.1 1.128 0.043 1.105 0.042 50.0 1.3 48.7 1.3