Week 8 of Pregnancy: A Raspberry, and Often the Week of Your First Scan
Key takeaways
- By week 8, the baby is about 16mm long — the size of a raspberry — with a recognisable head, eyes, arms, and legs.
- Many women have their first ultrasound, or dating scan, somewhere between weeks 8 and 14.
- A dating scan checks measurements, confirms a due date, and usually shows a visible heartbeat.
- Seeing movement on screen for the first time is often the moment pregnancy starts to feel real, rather than theoretical.
- Not everyone's first scan lands exactly at week 8 — timing varies by provider, and that's normal.
By week 7, I’d mentioned that our first scan had already been booked for the end of the first trimester, around this point. Week 8 is when that appointment actually happened for us, and it’s the first week in this whole series where something genuinely visible replaced everything that had, until now, only been described to us.
What’s actually happening in your body
The baby is now around 16mm long — about the size of a raspberry — and starting to look distinctly more like a baby than an embryo. The forming head, eyes, arms, and legs are now recognisable, the head has begun to uncurl, and the arms are lengthening ahead of the legs, according to NHS guidance on week 8 of pregnancy. By next week, the baby will roughly double in size again. This is also the window — typically weeks 8 to 14 — when most providers offer the first dating scan, usually as part of a booking appointment.
What our first scan was actually like
The scan happened for us in this week, in what would have been our third month. It was the first time we saw our baby actually moving on the screen — a small, wriggling shape that didn’t look like much to describe afterwards, but felt enormous in the moment. We were given a printed copy of the scan image, which we’ve kept since. The doctor took measurements, talked us through what she was seeing, and told us everything looked exactly as it should. That reassurance mattered more than I expected it to going in — I hadn’t realised how much quiet worry I was carrying until I heard someone qualified say, plainly, that things were fine.
If your first scan is coming up, know that it’s usually less clinical than it sounds. A dating scan measures the baby to estimate or confirm your due date more accurately than counting from your last period alone, and it typically shows a visible heartbeat by this stage — which for a lot of people, including me, is the moment it stops feeling abstract.
What I actually felt otherwise
Beyond the scan itself, this week didn’t bring much new physically — a continuation of the same mild tiredness and general adjusting to pregnancy that I’d already described in earlier weeks. The scan was the standout event of week 8, not any new symptom.
Nutrition focus this week
No changes from previous weeks — consistency with your prenatal vitamin and the general guidance in our foods and drinks to limit or avoid during pregnancy still matters more than anything new at this stage.
What to discuss with your doctor or midwife
If your first scan hasn’t happened yet, it’s reasonable to ask when to expect it — most providers schedule it somewhere in the 8-to-14-week window, and a scan slightly earlier or later than week 8 is not a cause for concern. It’s also a good time to ask what the scan will and won’t tell you (a dating scan is not the same as the later anomaly scan, which happens closer to weeks 18-21) so you know what to expect going in.
Frequently asked questions
When exactly does the first ultrasound happen?
It varies by provider, but it’s typically offered somewhere between weeks 8 and 14, often bundled with your first full booking appointment rather than scheduled separately.
What does a dating scan actually check?
Mainly the baby’s measurements, used to confirm or adjust your due date, and usually a visible heartbeat. It’s a different scan from the later anomaly scan, which checks development in more detail.
Is it normal to feel emotional at the first scan?
Very. For a lot of women, this is the first moment pregnancy feels concrete rather than theoretical — seeing movement or hearing a heartbeat for the first time can hit harder than expected, even if you felt calm going in.
What if my scan hasn’t happened by week 8?
That’s completely normal — scan timing depends on your provider and local scheduling, and anywhere within the 8-to-14-week range is standard practice, not a delay.
How big is the baby at week 8?
About 16mm long, roughly the size of a raspberry, with recognisable early features like the head, eyes, and developing limbs.
References
- NHS — Your Pregnancy and Baby Guide, Week 8. nhs.uk
Found this helpful?
