In today's Anomaly scan i.e 20 week 4 days...the femur length was 38mm .is it normal? And is it at higher end? what is importance of femur length?

A. Every child had a different lens it would completely depend on the genetics and a growth of the child so I do not so there is a problem with that because there is no specific length of the child that is depending on that is stagnant for every child it depends from child to child and their growth