What Is a Viability Scan?
What an early viability scan checks, who it is for, what the results can mean, and how it compares with a dating or reassurance scan.
Quick Answer
A viability scan is an early ultrasound, usually at 6 to 8 weeks, that confirms your pregnancy is developing as expected. It checks the pregnancy is in the womb, looks for a heartbeat, counts how many babies there are and takes early measurements. The NHS does not usually scan this early unless there is a clinical reason, so most parents who want one book privately. Compare it with our other early scan options.
What a Viability Scan Checks
"Viable" here means the pregnancy is where it should be and developing as expected for its stage. Your sonographer looks for:
- ✓The pregnancy is inside the womb
- ✓A heartbeat, where it is visible at this stage
- ✓How many babies there are
- ✓Measurements to give an early idea of dates
- ✓A written sonographer report for you to keep
Who Books a Viability Scan?
Mostly parents who would find it hard to wait until the NHS scan at 10 to 14 weeks. The most common reasons we hear are:
- A previous miscarriage, and wanting an early checkpoint this time
- Pregnancy after fertility treatment, before care moves to the NHS
- Being unsure of dates, or having irregular cycles
- Simply wanting to see the pregnancy for yourself before telling people
All of these are good reasons. You do not need a GP referral, and you do not need a clinical reason to book.
What the Results Can Mean
Most viability scans show a pregnancy in the womb with a heartbeat, measuring about where you expected. Your sonographer talks you through what they see on screen, and you leave with images and a written report.
Sometimes it is too early to tell. If you ovulated later than you thought, the pregnancy may be a few days younger than your dates, and the sac can be visible before the baby or heartbeat is. Where further assessment is clinically needed, your sonographer may recommend a follow-up scan when the pregnancy is easier to see.
Occasionally a scan shows something that needs NHS care. If that happens, your sonographer will explain what they have seen carefully and without rushing, give you a written report, and refer you to your NHS Early Pregnancy Assessment Unit for follow-up. You will not be left to make sense of it on your own.
Viability, Dating or Reassurance Scan?
The right early scan depends on how many weeks you are. Each one is built for a different stage.
| Scan | When | What it is for |
|---|---|---|
| Early Viability Scan | 6 to 8 weeks | Is the pregnancy in the womb, is there a heartbeat, how many babies |
| Early Dating Scan | 9 to 11 weeks | A measured due date, plus the heartbeat |
| Early Reassurance Scan | 12 to 14 weeks | Growth, movement and wellbeing before your NHS scan |
Bleeding or Pain? Contact the NHS First
A private scan is for reassurance, not urgent care. If you have bleeding, tummy or shoulder tip pain, dizziness or feel faint, contact your GP, NHS 111 or your local Early Pregnancy Assessment Unit straight away.
Book a Viability Scan in Gosforth
Our Early Viability Scan (£88) runs from 6 to 8 weeks and includes a sonographer report, 4 free A6 keepsake prints and a private digital gallery by email. No GP referral needed. Not sure how far along you are? See which early scan fits your dates.
Frequently Asked Questions
A viability scan is an early pregnancy ultrasound, usually between 6 and 8 weeks, that checks the pregnancy is in the womb, looks for a heartbeat, counts how many babies there are and takes early measurements. Its job is to confirm the pregnancy is developing as expected for this stage.
Between 6 and 8 weeks. At 6 weeks a heartbeat is often visible but it can still be too early to see, so many parents choose 7 weeks or later. Our Early Viability Scan runs across the whole 6 to 8 week window.
Very early on, findings can be inconclusive because of how far along the pregnancy is or when implantation happened. Where further assessment is clinically needed, your sonographer may recommend a follow-up scan. Any follow-up is at the sonographer's discretion based on what they see, and is not routinely included in the package.
No scan can promise that. A viability scan shows how the pregnancy looks on the day. Seeing the pregnancy in the womb with a heartbeat is a reassuring sign, and keeping your NHS appointments remains important.
Not quite. A viability scan at 6 to 8 weeks focuses on confirming the pregnancy and the heartbeat. A dating scan at 9 to 11 weeks focuses on a measured due date, because the baby is big enough by then to measure more precisely.