Cervix length! Pls help

Andrea❤

I had my 20 week scan today. They were able to get my cervical length over my belly instead of vaginally. Is that good or bad?? Does that mean its short?..

*i had an incompetent cervix with my first so we're closely monitoring my cervical length*

With my son they always checked vaginally so idk if this is good or bad :/