Dating ultrasound
A dating ultrasound is a scan performed early in pregnancy, usually between 8 and 13 weeks, to confirm or establish how far along you are and to calculate your estimated due date (EDD). The sonographer measures the embryo or fetus and compares this to standard growth charts. If the scan date differs from your LMP calculation by more than a few days, the scan result usually takes priority because it is more reliable. A dating scan also checks for a heartbeat, the number of embryos, and the location of the pregnancy in the uterus.
What This Means for You
Understanding Dating ultrasound is an important part of your first trimester journey. During pregnancy, your care team will use this term regularly. Being familiar with it means you can ask better questions and feel more confident at your antenatal appointments.
Explore our Pregnancy hubGood to Know
At KKH and NUH, the first trimester dating scan is often combined with the nuchal translucency (NT) screening, so booking early between 11 and 13 weeks plus 6 days allows you to do both in one visit.
Always consult your healthcare provider for personalised advice.
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