posted 20th April 2026
6-Week vs 8-Week Scans: What’s the Difference?
Early pregnancy is an exciting time, but it can also bring a lot of questions—especially when it comes to when to book your first ultrasound scan. Many parents consider having a scan at either 6 weeks or 8 weeks, but what’s the difference between the two?
In this guide, we’ll explain what you can expect at each stage, the key differences, and how to decide which scan is right for you.
Why Have an Early Pregnancy Scan?
Early scans—often called reassurance scans—are chosen by many parents to:
- Confirm the pregnancy
- Check your baby’s heartbeat
- Ensure the pregnancy is developing normally
- Provide peace of mind in the early weeks
Both 6-week and 8-week scans can offer reassurance, but the experience can be quite different depending on timing.
What Happens at a 6-Week Scan?
At around 6 weeks, your pregnancy is still in its very early stages.
What You Might See:
- A gestational sac
- A yolk sac
- A very small fetal pole (early baby)
- Sometimes a heartbeat(though not always)
At this stage, your baby is only a few millimetres in size, so visibility can be limited.
Things to Keep in Mind:
- It may be too early to detect a heartbeat
- Dates may be slightly off, especially if ovulation occurred later than expected
- You might be asked to return for a follow-up scan
A 6-week scan can be helpful for early reassurance, but it may also leave some uncertainty if everything isn’t clearly visible yet.
What Happens at an 8-Week Scan?
By 8 weeks, your baby has developed significantly, making the scan experience much clearer and more reassuring.
What You’ll Likely See:
- A clearly visible baby
- A strong, detectable heartbeat
- More defined shape and movement
At this stage, your baby is larger and easier to measure, which helps provide a more accurate due date.
Why Many Parents Choose 8 Weeks:
- Higher chance of seeing a heartbeat
- Less likelihood of needing a repeat scan
- A more detailed and reassuring experience
Which Scan Should You Choose?
The right timing depends on your personal situation and what you’re hoping to gain from the scan.
A 6-week scan may be right if you:
- Want early confirmation of pregnancy
- Are feeling anxious and want reassurance sooner
- Have been advised to check for specific concerns
An 8-week scan may be better if you:
- Want a clearer image of your baby
- Prefer a more definitive result
- Want to reduce the chance of needing a repeat scan
What If Dates Are Uncertain?
It’s very common for pregnancy dates to be slightly different from what you expect. Even a difference of a few days can affect what’s visible on a scan.
If your scan shows less than expected, it doesn’t always mean there’s a problem—it may simply be too early.
A Reassuring Experience at Every Stage
Whether you choose a 6-week or 8-week scan, both can be meaningful steps in your pregnancy journey. The most important thing is that you feel informed, supported, and reassured.
At Daisyscan, our experienced team provides professional and compassionate care, helping you understand every stage of your pregnancy with confidence.
Ready to Book Your Scan?
If you’re unsure whether to book a 6-week or 8-week scan, we’re here to help. Our team at Daisyscan can guide you in choosing the right time based on your needs.
Book your early pregnancy scan today and take the first step in seeing your baby.