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Table 6 Cross-sectional gestational age comparison of INTERGROWTH-21st and gender-specific (M/F) fetal head measurements at 5th and 95th percentiles

From: Sex differences in fetal growth and immediate birth outcomes in a low-risk Caucasian population

GA C5 IG F M C95 IG F M
BPD
14 24.2 26.8 24.0 24.3 30.2 32.5 29.7 30.4
15 28.2 29.6 27.8 28.2 34.5 35.6 33.7 34.5
16 31.5 32.5 31.4 32.0 38.0 38.8 37.5 38.3
20 43.5 44.7 43.1 44.0 51.3 52.2 50.5 51.7
24 54.7 57.0 54.2 55.5 64.8 65.7 63.8 65.5
30 72.2 73.9 71.6 72.9 83.6 84.0 82.4 84.2
34 80.6 82.4 79.8 81.2 92.9 93.4 91.6 93.7
37 84.7 86.7 84.1 84.6 98.2 98.4 97.2 99.2
HC
14 87.6 88.7 87.3 88.2 108.0 107.1 105.4 107.5
15 101.8 100.6 100.6 101.9 123.3 120.1 119.2 121.4
16 113.9 112.6 113.6 115.2 135.3 133.2 132.6 134.8
20 161.8 160.2 160.7 163.4 184.4 184.7 181.6 185.4
24 203,9 205.4 202.3 205.6 233.3 232.7 228.3 234.8
30 263.4 263.2 261.6 265.3 297.2 293.6 293.2 299.0
34 290.2 291.5 288.0 292.1 328.9 324.7 325.5 331.0
37 302.9 305.7 301.0 307.3 346.0 342.7 340.4 350.4
  1. Reference values in millimeters for fetal biparietal diameter (BPD) and head circumference (HC) for gestational landmark weeks for the 5th and 95th centiles. Total group (C5 and C95), INTERGROWTH-21st (IG) and fetal gender current study (F/M)
  2. GA gestational age (in weeks)