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Table 2 Comparison of two-dimensional and three-dimensional sonographic findings (n = 56)

From: Fetal weight estimation by automated three-dimensional limb volume model in late third trimester compared to two-dimensional model: a cross-sectional prospective observational study

Sonographic Findings

Hadlock

AVol

TVol

EFW (g)

3478 ± 467

3268 ± 467

3250 ± 485

MPE (%)

3.2 ± 8.9

- 3.3 ± 6.6

- 3.9 ± 6.1

EFW within 5% of BW, n (%)

19 (33.9)

28 (50.0)

31 (55.4)

EFW within 10% of BW, n (%)

42 (75.0)

46 (82.1)

46 (82.1)

  1. EFW estimated fetal weight, BW birth weight, MPE mean percentage error, AVol fractional arm volume, TVol fractional thigh volume
  2. Hadlock formula: log10 weight = 1.335–0.0034 AC x FL + 0.0316 BPD + 0.0457 AC + 0.1623 FL. Lee formulas: ln weight = 0.5046 + 1.9665 (ln BPD) − 0.3040 (ln BPD)2 + 0.9675 ln AC + 0.3557 ln AVol; ln weight = − 0.8297 + 4.0344 (ln BPD) − 0.7820 (ln BPD)2 + 0.7853 (ln AC) + 0.0528 (ln TVol)2
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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