Private Gender & Foetal Wellbeing Ultrasound Scan

From 16 - 18 Weeks

There is nothing more important than your baby’s well-being. Our Gender and Foetal Wellbeing Scan, offered at 16-18 Weeks, equips you with the information needed to confidently continue your pregnancy and take any required precautions to safeguard your baby’s health.

During your scan, one of our compassionate, Specialist Senior Sonographers will assess the wellbeing and development of your baby. Your scan includes foetal biometry, amniotic fluid and placenta checks, a basic anatomy evaluation, and a sex reveal. If you’d like to keep your baby’s sex a surprise, we are happy to accommodate. It’s your journey, and you are in control.

Here at Harley Street Ultrasound, your comfort is our top priority, and we use leading-edge ultrasound technology to give you peace of mind. Schedule your appointment today.


All Fees Inclusive

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Lines Open

Mon – Fri | 8 AM – 7 PM
Sat | 8 AM – 4 PM
Sun | Closed


99 Harley Street,
London W1G 6AQ

Gender & Foetal Wellbeing Scan

Ultrasounds help empower you to protect the health and wellbeing of your baby during your pregnancy


All Fees Inclusive

What's Included

One-to-One Specialist Appointment

Feel confident in the care you receive. Our specialists can interpret your scan and provide comprehensive advice if necessary.

No Referral Required

You do not require a referral before booking an appointment with our clinic — giving you back complete control of your health.

Same-Day Results

We aim to provide results to you on the day of your visit. Our Specialist Sonographer will explain their findings during your ultrasound examination.

Full Digital Report

Following your appointment, a complete digital report of your Ultrasound examination will be emailed to you directly and securely.

High-Res Digital Images

In addition to the report, images of your scan will be sent for you to share with a healthcare specialist of your choice.

Frequently Asked Questions

The gender and foetal wellbeing scan gives you the critical information you need about your baby’s health to feel confident and supported on your pregnancy journey. The scan is offered at 16 to 18 weeks. During the scan, our specialised consultants will perform the following:

  • Foetal biometry, which measures your baby’s size. Using this data, your consultant will provide the estimated foetal weight (EFW) and plot it on a growth chart, so you can see how your baby is tracking.
  • Assessment of the amniotic fluid, which surrounds your baby.
  • Assessment of the placenta’s location.
  • Assessment of the cervix. In most cases, this will take place during a transabdominal ultrasound, which means the ultrasound wand, called a transducer, will be placed on your tummy. If your consultant suspects an anomaly, they will request your permission to perform a transvaginal ultrasound. During a transvaginal ultrasound, a small, tampon-like probe will be inserted into your vagina. The process is quick and shouldn’t hurt.
  • Determination of your baby’s sex, if requested.
  • A basic anatomy check, which does not replace your anomaly scan. The NHS offers the anomaly scan at the 18 to 24-week mark. We also provide safe and private anomaly scans for pregnant people who are ineligible for NHS cover or do not wish to use NHS-provided antenatal care.

Building your family is one of the most exciting and rewarding experiences. However, it doesn’t come without ups and downs.

As an expectant parent, the health and development of your baby are your top priority. A foetal wellbeing scan gives you the reassurance that everything is progressing as it should be.

If an anomaly is suspected, a pregnancy scan can arm you with the information and support you need to ensure the best possible outcome before, during, and after delivery.

In addition to keeping you informed and up-to-date with your little one’s development, a foetal wellbeing ultrasound may be recommended if anomalies were detected previously.

Regular ultrasounds do not cause harm to you or your baby and empower your healthcare team to take any required precautions.

During your ultrasound, your consultant will calculate the size of your baby using head, tummy, and thigh bone measurements. With this information, they will estimate the weight of your baby (estimated foetal weight or EFW) and plot this on a growth chart.

If your baby is bigger or smaller than expected, your specialist will provide guidance on any next steps or further testing. They can also answer any questions you might have.

In addition, your specialist will assess your amniotic fluid and placenta’s location. Then, they will check your cervix and perform a basic foetal anatomy check.

Finally, they will reveal your baby’s sex. Please let your consultant know if you’d like to keep it a surprise.

Throughout the process, we encourage you to ask questions and raise concerns.

We understand how meaningful this journey is to you and your family, and we are committed to making your experience as positive as possible.

Also, while ultrasounds are pain-free and non-invasive, please let your specialist know if you experience discomfort at any time. We are here to help.

During your gender and foetal wellbeing ultrasound, your consultant will perform foetal biometry. This process measures your baby’s size using ultrasound images.

The results allow your healthcare team to estimate your baby’s age, weight, size, and growth – all of which offer valuable information about his or her health and wellbeing.

Your consultant will take several measurements during the foetal biometry process. Depending on the position of your baby, these might include:

  • The diameter and circumference of your baby’s head
  • The crown-rump length (CRL), which measures the length from the top of your baby’s head to his or her bottom
  • The circumference of your baby’s tummy
  • The length of your baby’s thigh bone, called a femur

Foetal biometry will show whether your baby is small, average, or large for his or her age. Your specialist can advise on the next steps should your baby fall outside the average range.

While it can be scary to find out your baby is not developing as expected, anomalies are not typically dangerous.

Your specialist will explain their findings and recommend further testing, if necessary. The more information you have, the better you can care for your baby – whatever that may require.

Yes. During your gender and foetal wellbeing scan, your specialist can tell you whether your baby is male or female.

If you do not wish to know, please inform your specialist. They can certainly keep it a secret if you’d like a delivery day surprise.

No. There are no known risks associated with ultrasound scans.

Unlike other medical imaging technologies, ultrasounds don’t use radiation. Instead, they use harmless sound waves to capture images of your baby and the inside of your body.

We advise drinking a few glasses of water an hour before your ultrasound as a full bladder will improve the visibility of your pregnancy on our external ultrasound scan.

There is no particular type of care required after a Gender & Foetal Wellbeing Ultrasound Scan. You may resume your regular diet and daily activities unless your doctor advises you differently.

There are no confirmed adverse biological effects on patients or instrument operators caused by exposures to ultrasound at the intensity levels used in diagnostic ultrasound.

But depending on your particular results, the doctor may give you additional or alternative instructions after the procedure.

Many of our patients are concerned that if they come to us for an ultrasound, they won’t be able to go back to public health. That simply is not the case.

Our goal is to give you answers as quickly as possible and get you on the right treatment path fast – no strings attached.

When you come to us, you will be seen by a qualified specialist who can determine if your situation is serious or not that same day.

We don’t want you to wait weeks on end for an appointment because every minute counts when it comes to something as important as your health.

If your situation is serious, our specialist will write to your doctor on the NHS advising them that you need an urgent appointment.

Registered & Regulated

Our team are fully registered and regulated for practice in the United Kingdom. Our patients should expect nothing less. 

Meet Our

Team of Specialists

The team at Harley Street Ultrasound Group is made up of Specialist Consultants and Specialist Sonographers you can rely upon. They are among the best in the industry.

This is backed up with a full range of qualifications and accreditations. All of our specialists are fully registered with all applicable medical regulatory bodies.

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At your fingertips

We provide scan images directly to your smartphone, often on the same day following your appointment. Gain the peace of mind and insight you need, without delay.


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The Harley Street Experience

We aim to provide the very best experience possible to all of our patients and visitors, and this covers every aspect of our services — from our specialists to our technology and of course to our clinic itself.

When you visit us, you will find our clinic to be a clean, comfortable and reassuring environment. We also maintain a high standard of Covid-19 best practices, ensuring maximum safety at all times.


What Our Patients Say About Their Experience

We are committed to providing a high standard of care to our patients. Take a look at some of the incredible responses we have received.

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