Hello mummies.. What the difference between simple & detailed scan? At week 20 is it?

Yupp I did detailed scan at 20th week. By detail, it means youll be in the room more than an hour to scan every inch of baby through ultrasound. They have to measure and identify all parts of baby to check for any abnormality. It wasnt done by my gynae, they fixed an appt for me to go for detailed scan.