Fetal abnormality scans, if gynaecologist advises me to go for a scan as to make sure that what they saw might not be serious what might it be that the dr saw?

Uncertain: There simply isn't enough information to be able to tell you what was of concern. The person to ask would be the gynecologist who is ordering the scans. Stay well.

Some basics: The quality of a given scan depends some on the equipment, some on the technician, some on if the baby cooperates & gets into useful positions and finally on the doc who interprets the study. You would not want to make a decision on a blurry picture & they don't either. Sending you to a center with more advanced equipment & skill is a way to provide better information.It is not always bad news.