If you choose to have a dating scan, it will most probably be your first scan. You will need to get a referral from your doctor or midwife for a dating scan. Most women can instead have their first scan at 11 to 13 weeks — this is usually called the 12-week scan.

What week should you get your first ultrasound?

Your First Ultrasound Its typically done between 7 and 8 weeks to verify your due date, to look for a fetal heartbeat, and to measure the length of the baby from “crown to rump.” At this ultrasound, youll also learn whether youre having one baby, twins, or more!