From the earliest heartbeat at 6 weeks to confirming your baby's position before birth — Sonoworld offers every private pregnancy ultrasound-scan you need, performed by a consultant-grade sonographer in a calm, unhurried clinic in Marylebone.
Secure online booking • Immediate confirmation • No hidden fees
Pregnancy brings a unique mix of excitement and anxiety. Whether you want to confirm a heartbeat in those early uncertain weeks, find out your baby's sex, or check growth and position before your due date, a private ultrasound-scan gives you answers quickly — without the wait.
Sonoworld is a CQC-registered diagnostic imaging clinic based at 29 Weymouth Street, Marylebone. Every pregnancy scan is performed by Daniela Stan, a consultant-grade sonographer with over 20 years of experience in obstetric and gynaecological ultrasound. Appointments are available Monday to Saturday, often on the same day you call.
All scans are performed using a high-resolution GE Voluson ultrasound machine — the same technology used in NHS teaching hospitals. You receive immediate verbal feedback during the appointment and a detailed written report, with annotated images, on the same day.
Select by gestational stage to find the right scan for where you are in your pregnancy.
Six specialist ultrasound-scans covering every stage of pregnancy — from the first heartbeat to confirming your baby's position before birth.
Confirms the presence of a fetal heartbeat, gestational age, and pregnancy location — ruling out ectopic pregnancy. Ideal after IVF, previous miscarriage, or when you simply need reassurance in those anxious early weeks.
Calculates your accurate due date using crown-rump length measurement, confirms fetal viability and heartbeat, checks for multiple pregnancies, and assesses the uterus and ovaries. Equivalent to the NHS 12-week scan.
Determines your baby's sex with high accuracy from 16 weeks. The scan also assesses fetal wellbeing, fetal movements, amniotic fluid volume, and placental position — giving you a comprehensive mid-pregnancy check alongside the gender reveal.
Measures fetal biometry — head circumference, abdominal circumference, femur length, and estimated fetal weight — and plots these against standardised growth charts. Assesses amniotic fluid, placental position, and fetal movements. Recommended for high-risk or post-dates pregnancies.
Creates three-dimensional surface images of your baby's face, hands, and body in real time. The ideal window is 26–30 weeks when skin is well developed. Includes a growth and wellbeing assessment, gender confirmation if requested, and a keepsake package with DVD, printed images, and a 3D keyring.
Confirms whether your baby is head-down (cephalic), breech, or transverse as your due date approaches. This is critical information for birth planning. The scan also assesses placental position, amniotic fluid, and fetal wellbeing — providing the clinical evidence your midwife or obstetrician needs.
Each pregnancy ultrasound-scan has an optimal gestational window. Booking at the right time ensures the most accurate and clinically meaningful results. The timeline below is a guide — your sonographer will advise on the best timing for your individual circumstances.
| Feature | Sonoworld | NHS |
|---|---|---|
| Waiting time | Same day | 6–8 weeks |
| Appointment duration | Unhurried | 15 min slot |
| Early scan (6–10 wks) | Available | Not routine |
| Gender determination | Yes | Not offered |
| 3D/4D imaging | Yes | Not offered |
| Same-day written report | Yes | Not routine |
| Partner welcome | Always | Restricted |
Private scans complement — not replace — your NHS antenatal care.
The NHS does not routinely offer scans before 12 weeks. A private early scan at 6–10 weeks provides the reassurance you need during the most anxious stage of pregnancy.
Appointments are available Monday to Saturday, often on the same day you contact the clinic. No long waits when you need answers quickly.
Daniela Stan has over 20 years of specialist obstetric ultrasound experience. Every scan is performed and interpreted by her — not delegated to a junior sonographer.
You receive a comprehensive written medical report with annotated ultrasound images on the same day. This can be shared directly with your midwife, GP, or obstetrician.
29 Weymouth Street
London W1G 7DB
Nearest tube: Regent's Park (Bakerloo) · Great Portland Street (Circle/Hammersmith & City) · Bond Street (Central/Jubilee)
Same-day appointments often available. Call for urgent bookings.
020 3633 4902
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