Method

Chronbach’s α

95% CI

p

Biparietal

0.886

0.851 - 0.923

<0.001*

Femur length

0.935

0.898 - 0.957

<0.001*

Trans-cerebellar diameter

0.941

0.913 - 0.960

<0.001*

Placental thickness

0.945

0.919 - 0.963

<0.001*

Trans-cerebellar diameter and Placental thickness

0.974

0.962 - 0.983

<0.001*