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See your baby's face, fingers, and movements in real time. The 3D/4D bonding ultrasound-scan at Sonoworld uses the GE Voluson platform to produce detailed surface-rendered images of your baby at the optimal gestational window of 26–30 weeks.
The 3D/4D Bonding Scan is temporarily suspended. We are working to restore this service and will announce availability as soon as possible. In the meantime, please call us or explore our other pregnancy ultrasound-scans below.
Standard 2D ultrasound sends sound waves in a single plane and reflects them back as a flat greyscale image. The 3D technique sends sound waves at multiple angles simultaneously; a powerful processing algorithm reconstructs the returning echoes into a three-dimensional surface-rendered volume. Add the dimension of time — continuous real-time acquisition — and you have 4D imaging: a live, moving picture of your baby.
The GE Voluson E10 platform used at Sonoworld produces the highest-resolution fetal surface rendering currently available in private practice. At 26–30 weeks, the baby has sufficient subcutaneous fat to define facial features clearly, and amniotic fluid volume is typically at its peak — both factors that directly determine image quality.
Why 26–30 Weeks?
Before 26 weeks, facial fat is still developing and features can appear angular. After 30 weeks, the baby descends deeper into the pelvis and the head may engage, reducing the acoustic window. The 26–30 week window consistently produces the clearest facial images.
GE Voluson 4D surface rendering at 28 weeks gestation
The 4D image quality depends on baby's position, the amount of amniotic fluid in front of the face, and gestational age. When conditions are optimal, the level of detail is remarkable.
| Feature | 2D Ultrasound | 3D/4D Ultrasound |
|---|---|---|
| Image type | Flat greyscale cross-section | Three-dimensional surface rendering |
| Facial features | Profile view only | Full face — nose, lips, cheeks, eyelids |
| Movement | Visible but flat | Real-time 4D video of yawns, stretches, smiles |
| Hands & feet | Outline only | Individual fingers and toes visible |
| Clinical value | Diagnostic — anatomy, measurements | Bonding + growth & wellbeing assessment |
| Keepsakes | Standard B&W thermal print | Framed prints, colour images, USB, keyring |
When Image Quality May Be Limited
If baby's face is pressed against the placenta or uterine wall, or if amniotic fluid is low, the surface rendering will be less clear. In these cases the sonographer will attempt to reposition the baby through gentle abdominal movement. Drinking extra water in the week before the scan and arriving well-hydrated improves fluid levels and image quality.
Every 3D/4D bonding scan at Sonoworld includes a comprehensive set of keepsakes and a clinical growth and wellbeing assessment — not just a video.
5× B&W 3D Prints
Mounted in a presentation frame — ready to display
USB with 6× Colour 3D Images
High-resolution colour images for printing and sharing
1× Colour 3D Print (4×6)
Full-colour printed photograph of your baby
1× Colour 3D Keyring
A personalised keepsake to carry with you
Growth Report
Estimated weight and biometric measurements at current gestation
Wellbeing Assessment
Baby's position, presentation, and placental location confirmed
Complimentary Gender Reveal
Confirmed during the scan if requested — no additional charge
30-Minute Appointment
Unhurried session — partners and family welcome
Partners & Family Welcome
The bonding scan is designed to be shared. Partners, grandparents, and siblings are all welcome in the scan room. The 30-minute appointment allows time for everyone to see the baby clearly on screen before keepsakes are prepared.
No formal preparation is required. A few simple steps in the days before your appointment will improve image quality significantly.
Hydration — the week before
Drink two extra glasses of water each day in the week leading up to your scan. Good maternal hydration directly increases amniotic fluid volume, which acts as the acoustic window for 4D imaging. More fluid around the baby's face means sharper, clearer images.
No full bladder required
Unlike early pregnancy scans, a full bladder is not needed for the 3D/4D scan. Arrive comfortably — there is no need to hold urine before the appointment.
Encourage baby to move
If baby is asleep during the scan, a small amount of something sweet — chocolate, fresh orange juice, or a fizzy drink — can encourage movement. Avoid caffeine before the appointment. A short walk around the clinic before entering the scan room can also help.
What to wear
Wear loose, comfortable clothing with easy access to the abdomen. A two-piece outfit or a top that can be lifted easily is ideal. Gel will be applied to the skin during the scan.
What to Bring
Gestational Timing Is Important
Booking outside the 26–30 week window significantly reduces image quality. Before 26 weeks, facial fat is insufficient for clear surface rendering. After 30 weeks, the baby's head may be engaged in the pelvis, limiting the acoustic window. Please check your gestational age before booking.
The 30-minute appointment follows a structured sequence to maximise both image quality and clinical value.
History & Consent
The sonographer takes a brief clinical history — gestational age, any concerns, whether you wish gender to be confirmed — and explains the scan process.
2D Orientation
A standard 2D scan is performed first to locate the baby's position, confirm the acoustic window, and identify the best approach for 3D/4D acquisition.
3D/4D Imaging
The GE Voluson 4D mode is activated. The sonographer captures the baby's face, hands, and feet in real-time 4D. If baby is not in an optimal position, gentle abdominal repositioning is attempted.
Growth & Wellbeing
Biometric measurements are taken — head circumference, abdominal circumference, femur length — to calculate estimated fetal weight and plot growth on a centile chart. Placental position and baby's presentation are confirmed.
Keepsakes & Report
The sonographer prepares your keepsake package — framed prints, USB, keyring, and colour image — while verbally summarising the growth and wellbeing findings. The written growth report is provided before you leave.
While the 3D/4D scan is temporarily unavailable, all other pregnancy ultrasound-scans are available to book online now.
Confirms heartbeat, gestational age, and pregnancy location. Ideal after IVF or previous miscarriage.
Accurate due date calculation, viability confirmation, and multiple pregnancy check.
Sex determination with high accuracy from 16 weeks, plus fetal wellbeing assessment.
Fetal growth measurements, estimated weight, amniotic fluid, and Doppler blood flow assessment.
Confirms baby's position — cephalic, breech, or transverse — before birth planning discussions.
Clinic Address & Contact
Nearest Tube Stations
Regent's Park (Bakerloo line, 5 min walk) · Great Portland Street (Circle, Hammersmith & City, Metropolitan lines, 7 min walk) · Bond Street (Central, Jubilee lines, 12 min walk)
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