Anomaly / Anatomy Scan - Morphology Ultrasound Scan - 18-24 weeks of pregnancy

  •  Appointment duration 40 minutes
  • All of our Specialist Sonographers are highly trained experts, specialised in fetal ultrasound scans
  • A Consultant is available to discuss any findings with you if necessary
  • If you require a second opinion, please ensure that you provide us with your relevant ultrasound report
  • ahead of your appointment 
  • Your Questions answered
  • Baby and Parents-to-be focused care
  • We offer longer appointment times as routine- more time for baby, more time for you
  • Committed to advances in pregnancy care
  • The latest Ultrasound Technology and Software


The mid-pregnancy 20 week Anomaly (or anatomy) Scan is an important detailed ultrasound scan of your baby, including placenta position, amniotic fluid and fetal growth. It is offered to everybody by the National Health Service. The purpose of the anomaly scan is to determine the presence of rare conditions including those of the brain, spine or heart conditions.

Our Specialist Sonographers assess baby’s growth to ensure that baby is growing well. These measurements include baby’s head and brain anatomy, the abdominal circumference and femur length. These measurements are plotted onto charts, provided in a detailed ultrasound report.

Our Specialist Sonographer will complete a detailed, comprehensive ultrasound scan to check your baby's brain, face and lips, heart, spine, stomach, kidneys, bowel and limbs. The Anomaly pregnancy scan checks the physical development of your baby. The Specialist sonographer is highly trained to determine any differences in your baby’s development, although the ultrasound scan cannot pick up every condition.

We will give a detailed explanation of our ultrasound findings, and also check the placenta, amniotic fluid and the umbilical cord. You can find out the sex of your baby from the Anomaly Scan if you wish to. Just let our Sonographer know, and they will look at baby’s gender.

When is the best time to have an Anomaly Scan? 

Due to the development of the baby’s brain, and the size and complexity of the baby’s heart, 20 weeks onwards is the optimum gestation to perform the routine anomaly scan. 

Some people choose to have their anomaly ultrasound scan from 18 weeks, however the anatomy may be more difficult to visualise and it may be necessary to book another scan at a later date to complete the anatomy checks. There will be a charge for the extra scan. If you do chose to have your anomaly scan as early as 18 or 19 weeks, please do not be concerned if the Specialist Sonographer is unable to visualise some of babies anatomy. They will be limited by the early gestation. Baby’s grow and develop weekly, and within a few weeks they will be able to complete the checks. 

If you have a higher BMI, it may be best to wait until 22-23 weeks.

Anomaly  Anatomy Scan - Morphology Ultrasound Scan - 18-24 weeks of pregnancy Harley Street London


Which Pregnancy Scans are currently offered by the National Health Service?

Pregnant women are offered two routine ultrasound scans during pregnancy, this is called the Fetal Anomaly Screening Programme. 

The Nuchal Translucency scan is offered between 12-14 weeks of pregnancy to screen for the most common chromosomal conditions including Down’s syndrome, Edwards’ Syndrome and Patau’s syndrome.

The other routine pregnancy scan offered by the NHS is around 20 weeks of pregnancy called the Anomaly scan. The purpose of this ultrasound scan is to assess your baby’s physical development and to look for 11 rare conditions, including head/brain and heart conditions.

The 20 week anomaly scan is a very important ultrasound scan during pregnancy. Parents to be often come to have a scan with us as a result of the following:

  • The NHS Sonographer was unable to complete the Anomaly scan due to the position of baby
  • The NHS were not able to schedule the Anomaly scan appointment at a convenient time for the Parents to be
  • You did not receive a clear understanding of the Anomaly scan and would like a more detailed explanation
  • The NHS Sonographer reported findings during the Anomaly scan and you wish for a second opinion
  • You would prefer a more comprehensive, detailed ultrasound scan to be performed in a calming and relaxing environment
  • You would like some extra reassurance in your pregnancy

How is the Anomaly Scan performed?

  • Anomaly Scans are performed between 18-24 weeks of pregnancy and are performed ‘transabdominally’ which means over the tummy.
  • This is the optimal stage of pregnancy to perform a detailed and comprehensive assessment of your baby’s physical development and growth.

Which structures of the baby can be checked by ultrasound?

The heart, brain, face, spine, bowel, stomach, kidneys, limbs, hands and feet for any major physical conditions.

Anomaly  Anatomy Scan - Morphology Ultrasound Scan - 18-24 weeks of pregnancy Harley Street London

What other information can I expect from my pregnancy scan?

  • The appearance and position of the placenta
  • An assessment of the amniotic fluid (the fluid your baby lives in during pregnancy)
  • If you wish to know the gender of your baby, the sonographer will be able to tell you
  • If you have a medical history which indicates that an assessment of the cervix should be performed, the Cervical transvaginal ultrasound scan can be performed in addition to the Anomaly Scan.

Is there someone I can talk to about the outcome of my Anomaly scan?

Our sonographers are highly skilled and accredited in the performance of the Anomaly Scan. They will be able to talk to you if you have additional questions or concerns. The Consultant is available if needed to discuss any unexpected findings.

Do you require a second opinion?

If you are looking for a second opinion, please ensure that you provide us with your relevant ultrasound report ahead of your appointment to ensure that we can provide you with the best service. 

Ultrasound reports should be sent to

What are the indications or reasons for having this Anomaly scan?

The Anomaly Scan is recommended for all babies, ensuring that if any conditions are present Parents to be and baby are well prepared, supported and monitored.

Consultant or Sonographer?

  • In the majority of pregnancies an Anomaly Scan can be performed by one of our experienced sonographers. All of our sonographers are fully qualified and accredited, so you are in safe, expert hands.
  • If you are experiencing complications with your pregnancy or need a second opinion, an Anomaly Scan with our Consultant is recommended.

Is it easy to make an appointment?

We offer morning, afternoon and evening availability during the week, as well as weekend appointments. A surcharge will be applied for evening and weekend appointments. We have a wide range of availability therefore same day appointments can be easily arranged. Our Sonographers are here to reassure even at short notice.

What you will receive:

  • Detailed ultrasound report, with charts and images, to file with your maternity notes.
  • YourBabyScan Images and Videos direct to mobile and email
  • Baby Ultrasound Images to take home
  • Longer appointment times as routine
  • A calm and relaxing environment
  • High quality professional care from our Specialist Sonographers who are committed to advances in pregnancy care

How is the pregnancy scan electronically sent to you?

The Birth Company is the first clinic in UK to offer this service allowing you to share your pregnancy ultrasound with friends and family wherever they are in the world. This optional recording can be shared via Email, Facebook, Instagram and Twitter. We will offer this to you routinely at the end of the Anomaly Scan. The transmission is instantaneous. Please note that the video of baby moving will not have any sound. It is a national policy not to permit patient or partner's phone recording in a room. Simply tell your sonographer that you would like an electronic transmission of your scan. It will appear on your phone immediately.

How to Prepare for your Anomaly Scan?

  • A moderately full bladder will improve the visibility of the scan performed over the tummy

Is there an additional cost for a twin pregnancy?

Yes. An additional £30 charge is applied for mothers expecting twins or triplets. We need to allocate more time for your appointment as there are twice (or three) times as many ultrasound checks to be performed as there are more babies.

What is the next pregnancy scan following an Anomaly Scan?

The NHS will not routinely offer any further pregnancy scans however a Wellbeing and Growth scan can be done any time after 22 weeks for reassurance and to assess baby’s growth pattern.

 A Cervical Length Assessment can be added to your Anomaly Scan - Click here for more details 

Cancellation Policy

For cancellations, a full refund of your appointment fee will be given with 24 hours notice. If less than 24 hours notice of cancellation is given, a £50 cancellation fee will be applied. Our full terms and conditions can be found here: Terms and Conditions

Covid-19 (SARS-CoV-2) IgG Antibody blood test £100

The Birth Company is now able to offer the Covid-19 (SARS-CoV-2) IgG Antibody blood test, at a cost of £100. If you would like to have this blood test performed whilst attending for your ultrasound scan appointment, please let us know ahead of your appointment in order to allow for a longer appointment time and to take payment over the telephone using our secure payment portal.
For more information about the test, please follow this link to The Doctors Laboratory website. 

Patient Information

Some early pregnancy ultrasound scans are performed using a transvaginal probe technique. This technique is used to view the pelvic anatomy optimally, as the ultrasound probe can transmit safe ultrasound waves more directly to the pelvic area. In later stages of pregnancy, it may be advised to perform a transvaginal ultrasound scan to have a closer look at a baby’s anatomy, or to assess the maternal cervix.

There is no clinical risk associated with performing a transvaginal ultrasound scan. Transvaginal ultrasound scans can safely be performed during episodes of vaginal bleeding. 

It is important that you understand the procedure that is associated with this examination.

The ultrasound transducer will be placed in the vagina (the probe is prepared using high grade medical disinfectant)
The transducer will be introduced with a latex / non latex type covering and sterile ultrasound gel.
It will be necessary to move the transducer from side to side, up and down and may be swivelled to obtain ultrasound images of your pelvic anatomy.
If you prefer, you may insert the transducer yourself, otherwise the person conducting the examination will do this.
A third person may be present during the examination acting as a chaperone, if required by the sonographer or yourself.
You may request the examination to be stopped at any time during the procedure.   

Transvaginal Ultrasound Consent

Below is a link to our Transvaginal Ultrasound Consent Form. This must be completed ahead of your appointment to confirm whether you consent or do not consent to having your scan performed internally.

Transvaginal Ultrasound Consent Form 


If you are a virgin (Virgo intacta; hymen intact), guidance determines that transvaginal ultrasound scans are clinically contraindicated. If you have discussed this concern with your referrer and wish to proceed with a transvaginal ultrasound scan, this type of examination can be performed.

Pregnancy Ultrasound Scans Available

Longer Appointments - Time to discuss choices with our expert staff

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Clinic Locations

Visit our clinic in Central London and Cheshire


137 Harley Street, London W1G 6BF
Nearest Underground Tube Stations

Baker Street
Regent’s Park
Great Portland Street


Alderley Edge Medical Centre, Talbot Road, Alderley Edge, Cheshire, SK9 7HR
Nearest Overground Train Station

Alderley Edge