A dating ultrasound or dating scan is a scan done early in pregnancy (before 12 weeks). It is usually done to check how many weeks pregnant you are and therefore to calculate the estimated due date, but it can be done for other reasons.

When do you have a dating ultrasound?

Dating Ultrasound (10-13 Weeks) If you didnt get an ultrasound around 6-8 weeks, youll probably have a dating ultrasound around 10-13 weeks of pregnancy. This transabdominal exam will also predict your due date, check the fetal heartbeat, and reveal the number of babies in the womb.