Table 4: Median Multiples of the Median (MoM) for free β-hCG and PAPP-A, CRL, NT, maternal weight and height in the IUGR group (birth weight below the 3rd centile) compared to the normal group.

Fetal weight (percentile) Median SD P value
free β-hCG (MoM) > 10th 1.26 0.86 < 0.001
< 3rd 1.06 0.75
PAPP-A (MoM) > 10th 1.12 0.81 < 0.001
< 3rd 0.85 0.66
CRL (percentile) > 10th 58.74 21.45 0.001
< 3rd 55.04 21.25
NT (percentile) > 10th 92.71 17.63 0.821
< 3rd 92.92 16.61
Maternal weight (kg) > 10th 66.05 13.88 0.014
< 3rd 64.19 14.79
Maternal height (cm) > 10th 163 6.2 < 0.001
< 3rd 161.06 6