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Table 3 Comparisons of discordances of ultrasound parameters in the second and third trimester between growth discordant twin and normal twin

From: Predictive value of prenatal ultrasound parameters for dichorionic growth discordant twins

Parametera Second-trimester Early third-trimester Late third-trimester
Growth discordant group(n = 71) Normal growth group(n = 346) P Growth discordant group(n = 71) Normal growth group(n = 346) P Growth discordant group(n = 71) Normal growth group(n = 346) P
BPD [M (min-max), %] 5.40 (0.30–13.16) 3.45 (0.00–10.91) 0.735 7.18 (0.00–17.98) 3.43 (0.00–12.94) 0.005 5.38 (0.00–11.46) 3.26 (0.00–12.94) 0.005
HC [M (min-max), %] 5.82 (0.17–13.48) 2.48 (0.00–10.45) 0.008 5.16 (0.00–17.97) 2.88 (0.00–9.28) 0.043 3.64 (0.33–11.29) 2.56 (0.00–12.57) 0.040
AC [M (min-max), %] 1.48 (0.00–15.08) 3.24 (0.00–14.98) 0.897 8.81 (1.26–25.90) 4.54 (0.00–15.09) < 0.001 4.94 (0.68–26.90) 3.46 (0.30–20.56) < 0.001
FL [M (min-max), %] 7.69 (2.03–20.83) 2.82 (0.00–7.89) 0.324 6.50 (1.61–22.95) 3.42 (0.00–12.73) < 0.001 4.41 (0.00–14.71) 2.94 (0.00–12.50) < 0.001
EFW [M (min-max), %] 11.06 (2.76–29.74) 10.87 (2.23–26.27) 0.713 21.32 (4.35–57.08) 12.38 (2.63–29.80) < 0.001 16.75 (1.08–42.73) 10.56 (1.66–31.33) < 0.001
DVP [M (min-max), %] 4.66 (0.00–27.50) 9.04 (0.00–72.97) 0.562 15.21 (2.50–57.53) 12.98 (0.00–59.52) 0.735 10.00 (0.00–61.36) 14.08 (0.00–76.09) 0.183
  1. aBPD biparietal diameter; HC head circumference; AC abdominal circumference; FL femur length; EFW estimated fetal weight; DVP deepest volume pocket