The purpose of the dating scan is to check: how many weeks pregnant you are and work out your due date (the estimated date of delivery, or EDD) whether youre expecting more than 1 baby. that the baby is growing in the right place.

What does a dating scan involve?

The sonographer will put gel on your abdomen and move a hand-held device called a transducer, back and forward over your skin. In some situations, such as when the scan is completed before 10 weeks of gestation or you are overweight, you may also need a vaginal scan.