posted 1st June 2026
What the 20-Week NHS Scan Looks For
The 20-week NHS scan—often called the mid-pregnancy scan—is one of the most important milestones in your pregnancy journey. It’s an exciting opportunity to see your baby in more detail, but it also plays a key role in checking your baby’s development.
In this blog, we’ll explain what the 20-week scan looks for, what you can expect during the appointment, and why this scan is so important.
What Is the 20-Week NHS Scan?
The 20-week NHS scan usually takes place between 18 and 22 weeks of pregnancy. It is a detailed ultrasound that carefully examines your baby’s growth, organs, and overall development.
This scan helps to ensure that your baby is developing as expected and can identify any potential concerns early on.
What Happens During the Scan?
Your appointment will typically last 20–30 minutes, as the sonographer takes time to examine your baby from different angles.
During the scan:
- You’ll lie comfortably on an examination couch
- A gel is applied to your abdomen
- A handheld device (transducer) is moved gently over your stomach
- Images of your baby appear on a screen in real time
Your sonographer may pause at times to take measurements or capture specific images.
What Does the Scan Look For?
The 20-week scan is very thorough. It checks many aspects of your baby’s development.
🧠 Brain and Head
- Shape and structure of the brain
- Size of the head
- Development of key brain areas
❤️ Heart
- Structure of the heart
- Chambers and blood flow
- Heartbeat and rhythm
🦴 Spine
- Alignment of the spine
- Development of vertebrae
👶 Face
- Features such as the lips and profile
- Checks for conditions like cleft lip
🫁 Organs
- Lungs, stomach, kidneys, and bladder
- Position and development of internal organs
✋ Limbs
- Arms, legs, hands, and feet
- Movement and formation of bones
📏 Growth Measurements
- Size of your baby
- Head circumference, abdomen, and limb length
- Overall growth compared to expected development
🌊 Placenta and Amniotic Fluid
- Position of the placenta
- Levels of amniotic fluid
- Environment supporting your baby
Can You Find Out the Baby’s Gender?
Yes—if you would like to know, the 20-week scan can often determine your baby’s gender.
However, this depends on your baby’s position at the time of the scan.
What If Baby Isn’t in the Right Position?
Sometimes your baby may be curled up or facing away, making it harder to see certain details.
If this happens, you may be asked to:
- Move around
- Have a short walk
- Return later for another attempt
This is completely normal and nothing to worry about.
What Happens After the Scan?
In most cases, you’ll be told straight away if everything appears normal.
If anything needs further review, you’ll be advised on the next steps and given the appropriate support.
Why This Scan Is So Important
The 20-week NHS scan is a key part of pregnancy care because it:
- Provides a detailed check of your baby’s development
- Helps identify potential concerns early
- Offers reassurance that your pregnancy is progressing well
It combines both medical insight and a special bonding experience.
A Memorable Experience for Parents
While the scan is very detailed, it’s also a wonderful moment for parents. You’ll be able to:
- See your baby moving
- Watch them stretch or kick
- Take home some images to remember the moment
For many expecting parents, this is one of the most exciting scans during pregnancy.
Experience a Well-Being Scan with Daisyscan
At Daisyscan, we provide a professional and welcoming environment where you can feel comfortable and supported throughout your scan.
The Well-Being Scan will complement the NHS care; allowing more time to for parents and extended family to experience the this exciting during your pregnancy.
Book Your Well-Being Scan Today (from 16 - 32 weeks)
The Well-Being scan is an important step in your pregnancy journey—offering both reassurance and a closer look at your growing baby. A special time for the whole family to enjoy.
Book your ultrasound scan with Daisyscan today and experience expert care in a calm and caring setting.