Umbilical artery

Before

After

p

RI (resistance index)

Min. - Max.

0.06 - 0.98

0.07 - 0.90

tp = 0.001*

Mean ± SD.

0.70 ± 0.15

0.75 ± 0.14

Median

0.73

0.78

PI (pulsatility index)

Min. - Max.

0.1 - 2.60

0.14 - 2.70

Wxp < 0.001*

Mean ± SD.

1.35 ± 0.49

1.47 ± 0.46

Median

1.29

1.44

SDR (Systolic-diastolic ratio)

Min. - Max.

0.80 - 10.60

1.0 - 11.0

Wxp < 0.001*

Mean ± SD.

4.0 ± 1.86

4.31 ± 1.83

Median

3.61

3.95