How to diagnosed ventriculomegaly in 1st trimester anomaly scan?

How to diagnosed ventriculomegaly in 1st trimester anomaly scan ?

The ratio between the plexus and lateral ventricle diameter (PDVD), the plexus and

lateral ventricle length (PLVL), the plexus and lateral ventricle

circumference (PCVC) and the ratio between the plexus and lateral

ventricle area (PAVA) are used ,For diagnosing Ventriculomegaly the mean ratios were 0.49 for PDVD

0.38 for PLVL 0.47 for PCVC 0.29 for PAVA

Ya I copy pasted your comment after that I found !

I also don’t have access to those articles. The contents I shared are from this book