What Is a Dating Scan?
A Dating Scan is a non-invasive early pregnancy ultrasound usually performed between 8 and 11 weeks of pregnancy. It is designed to measure your baby's size, typically using the crown-rump length (CRL), and helps establish how far along your pregnancy is and estimate your expected due date.
No special preparation is usually needed. In some cases, arriving with a comfortably full bladder may help produce clearer images, depending on your individual scan and stage of pregnancy.
Why This Scan Matters
A Dating Scan helps confirm your gestational age and provides a more accurate estimated due date. It also allows our specialists to assess early fetal development, check growth, identify multiple pregnancies such as twins or triplets, and confirm pregnancy viability by assessing the heartbeat and early development.
The Benefits
Precision from the Start: An accurate pregnancy date helps guide important milestones, screening appointments and future pregnancy care.
Early Reassurance: Seeing your baby's development and heartbeat can provide reassurance and help make the early stages of pregnancy more comfortable and confident.
Completely Non-Invasive: Ultrasound is a non-invasive imaging procedure and the scan can usually be completed within a short appointment.
What to Know Before You Come In
While a Dating Scan is highly useful for establishing gestational age, ultrasound measurements can have a small margin of variation. If the scan raises any questions about fetal size, development or an unexpected finding, our specialists will explain the findings clearly and discuss the appropriate next steps with you.
Seeing your baby for the first time can bring excitement, reassurance and sometimes anxiety. Our team is here to support you throughout the scan and answer your questions with care and understanding.
Related Pregnancy Screening
First Trimester Combined Screening: Performed alongside or shortly after the Dating Scan, this screening can assess the risk of Down syndrome and certain other chromosomal conditions.
Non-Invasive Prenatal Testing (NIPT): A maternal blood test that provides additional information about the likelihood of certain chromosomal conditions and is generally performed later in the first trimester.
Frequently Asked Questions
How accurate is a Dating Scan?
A first-trimester ultrasound is one of the most reliable methods for estimating gestational age, particularly when performed early in pregnancy.
Will I see my baby's heartbeat?
In many pregnancies, cardiac activity can be seen during an early ultrasound. Your specialist will explain what can be seen based on your baby's gestational age and development.
Can I bring my partner?
Yes. We welcome your partner or a loved one to accompany you and share this important moment, subject to the centre's scan-room policy.
What if my dates don't match my scan?
Differences between menstrual dates and ultrasound measurements are common. Your specialist will assess the findings and advise whether your estimated due date should be adjusted.
Book Your Dating Scan
Give your pregnancy a clear and confident start with an early Dating Scan. Book a consultation with Promise Fetal Medicine and Pregnancy Scan Centre and receive expert guidance from our experienced fetal medicine team.