Welcome to Clinical Diagnostic Services




We do not offer non-essential, non-medical social scans. 

2D (still and moving) and 3D images are available to patients but only when produced as part of a clinical scan.  In addition sexing of the baby can also be carried out from 16 weeks onwards, but again only as part of a clinically indicated scan and with the agreement of both partners present.

Note: sexing by ultrasound in mid to late pregnancy is very accurate indeed, but cannot be regarded as 100%. 

Partners are always welcome to attend all scans.

Ultrasound can offer considerable reassurance to parents at all stages of pregnancy, and we hope will contribute to the personal enjoyment of your special journey through pregnancy.

For further enquiries and appointments please head over to our Contact Page

Miscarriage within the first 3 months of prgenancy is sadly something that affects at least 1 in 5 women.

In cases of 3 or more consecutive miscarriages, this is regarded as recurrent miscarriage.

Advanced 2D and 3D transvaginal scanning (TVS) can highlight many anatomical and gynaecological issues which can cause early miscarriage. In addition, modern colour Doppler (blood flow) ultrasound can identify hormonal (progesterone) activity of the ovaries which is crucial to normal implantation and growth of pregnancy. Poor progesterone levels in early pregnancy can increase the risk of miscarriage. 

CDS offers very advanced imaging technology and scanning expertise, and Bill Smith, Head of CDS, is recognised internationally for his work in this area.

For general enquires, further information and appointments please view our Contact Page


What is it?

An ultrasound scan which provides midwives and doctors with valuable information about pregnancy progress and the wellbeing of the baby. It can remove worry and provide parents with considerable reassurance as the birth of their child or children approaches.

When can you have it?

From 28 weeks through to birth.

What can it show?

Ultrasound scanning offers important clinical detail, including:

  • position of the baby
  • growth and weight of the baby
  • placental appearances and umbilical cord blood flows
  • amniotic fluid volumes

For general enquires, further information and appointments please view our Contact Page


What it is?

This is a universal 2D and 3D ultrasound check offered to pregnant women to check the development of the baby.

When can you have it?

20 – 22 weeks.

What can it show?

High resolution ultrasound imaging will show:

  • Assessment of general pregnancy development and baby’s growth
  • Major organs, such as the skull and brain, heart and chest, abdominal organs, limbs and spine etc
  • Doppler blood flow studies of the umbilical cord and uterine vessels which can often predict issues later in pregnancy such as pre-eclampsia, high blood-pressure, poor growth of the baby etc
  • Problems associated with the uterus or cervix which might affect normal development of the pregnancy and safe delivery of the baby

Please note the vast majority of pregnancies are totally normal and ultrasound scanning provides considerable reassurance for parents.

For general enquires, further information and appointments please head over to our Contact Page

Non-invasive prenatal testing (NIPT) e.g. Harmony test

What it is?

This is a very advanced blood test which examines cells from the baby which circulate within the mother’s blood. It is shown to be superior to the standard Nuchal blood test which is still widely offered to pregnant women.

When can you have it?

We recommend the blood test is carried out from 10 weeks onwards, and in fact can be done at any point throughout the pregnancy.

What can it show?

The blood test has been shown to be a very effective way of screening for several of the more common potential chromosomal abnormalities such as Down’s Syndrome, Edward’s Syndrome, Patau Syndrome, sex-link disorders etc. Recent advances in NIPT can identify more complex abnormalities.

A consultation and basic ultrasound scan is carried out as part of the appointment. The scan is required to a) date the pregnancy b) exclude multiple pregnancy and c) confirm healthiness of the pregnancy.

Please feel free to contact us for any further details or if you have any questions.

The vast majority of pregnancies are normal and result in the birth of a totally healthy baby.  Experience shows this also applies to mothers over the age of 40 who attend CDS.

For further information and appointments please visit our Contact Page  


What it is?

A very detailed ultrasound examination of the baby, using advanced 2D and 3D ultrasound imaging.

When can you have it?

13 – 15 weeks

What can it show?

  • It serves to complement NIPT by identifying ultrasound features within the baby which might be associated with chromosomal disorders.
  • It provides a very detailed examination of the baby’s physical development and pregnancy progress at an early stage.

Advanced ultrasound scanning and screening programmes offer tremendous reassurance to parents, and in the vast majority of cases confirm a healthy baby.

For further enquiries and appointments please head over to our Contact Page

Early Pregnancy Ultrasound at CDS

What it is?

Transvaginal (TVS) ultrasound, or internal scanning, enables very precise assessment of pregnancy development. It is the established technique for scanning pregnancies up to 10 weeks gestation, and is regarded as being very safe for both baby and mother. It is far superior to transabdominal scanning.

When can you have it?

Routinely used from 5 – 10 weeks, but is often used earlier in special circumstances.

What can it show?

  • Very early evidence of pregnancy
  • Detection of heartbeat from around 5 weeks
  • Location and numbers of pregnancy
  • The healthiness of the womb
  • Hormonal activity essential for early pregnancy development
  • Complications, such as ectopic pregnancy etc.

Early scanning can provide tremendous reassurance and support, particularly where there might be vaginal bleeding or discomfort during the first few weeks or a history of infertility or recurrent miscarriage.

For general enquires, further information and appointments please view our Contact Page

Book your appointment

Contact Us

Call Us 020 8732 3070