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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