The scan will usually show that your pregnancy is less far along than suggested by your LMP.
Your midwife may recommend an early scan at between six weeks and 10 weeks if you have experienced bleeding, pain, or problems in a previous pregnancy.
However, if all is going well in this pregnancy, your particular hospital may not offer the scan.
Ask your GP if you want to have one anyway for extra reassurance, as she may be able to refer you.
Dating scans are the most accurate way of predicting your due date.
Having a scan in the first few months of pregnancy can be a thrilling experience.
It's amazing to see the little blob with a heartbeat that will soon become your baby.
The whole point of the scan is to work out how many weeks pregnant you are.