Welcome to Clinical Diagnostic Services



What is it?

Male screening at CDS involves ultrasound investigation of the testes and prostate. We provide direct access to a leading andrology clinic specialising in semen analysis and associated tests.

What can it show?

Detailed ultrasound examination of the testes is very easy, causes no discomfort and provides valuable information. Poor sperm quality can be associated with anatomical issues, fluid collections or distended veins (varicoceles) within the scrotum, infection or even in rare cases malignancy.  Ultrasound of the testes is of considerable benefit as an initial investigation and can identify these conditions.  It is strongly advised particularly in cases of poor sperm test results.

For a significant number of couples attending for fertility investigations, there is an issue with the male partner. At CDS we recognise the importance of focussing on the needs of both partners.

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

What is it?

SIS (sometimes referred to as fluid ultrasound or saline sonohysterography) is a specialised technique for checking the healthiness of the womb cavity and its lining. CDS are pioneers in the development of SIS and one of the few clinics worldwide who routinely offer 3D virtual imaging as part of the procedure. This new development can very often provide an alternative to the more invasive and costly surgical investigations.

SIS involves the introduction of saline (sterile water solution) through the cervix (neck of the womb), similar to HSS. Gentle distension of the womb cavity allows very detailed examination using advanced 3D ultrasound.

What can it show?

Advanced transvaginal 3D ultrasound imaging can clearly show:

  • size and shape of the womb cavity
  • any anatomical abnormalities
  • the presence of abnormal lesions within the cavity, such as fibroids, polyps, adhesions, scar tissue etc.

SIS has been shown to be hugely successful in the investigation of fertility issues, as well as identifying problems causing recurrent miscarriage.  In addition, a thorough transvaginal (TVS) examination of the pelvic organs is always carried out.  SIS is usually carried out as part of HSS assessment of the Fallopian tubes as part of fertility investigation.

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

What is it?

HSS (sometimes referred to as HyCoSy or ultrasound SHG) uses a special solution to accurately assess the healthiness of the Fallopian tubes. The procedure involves a speculum examination similar to that of a smear test. The solution is gently flushed through the womb cavity and into the Fallopian tubes. This is carried out with continual ultrasound scanning.

What can it show?

HSS can demonstrate any blockages or other issues which might be associated with the tubes and cause fertility issues.

In addition, a thorough transvaginal (TVS) examination of the pelvic organs is always carried out. HSS will also sometimes include an SIS as part of the same procedure.

A patient information brochure will be given on booking which explains the procedure in further detail.

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

It is very natural for a large number of women over 40 to conceive each year.  The risks associated with pregnancy in the older patient are widely stated, but the majority of patients over 40 go on to enjoy a totally normal pregnancy and birth of a very healthy child.

At CDS we see a significant number of older women who have struggled to conceive but have subsequently become pregnant following comprehensive cycle monitoring.  This is particularly true when advanced ultrasound scanning excludes the presence of any gynaecological disease or ovulatory disorder.

CDS is able to provide continuity of care throughout all stages of pregnancy, including all relevant screening tests.

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

Interested in Fertility Treatment Abroad?

CDS offers tremendous experience in key aspects of IVF management, and as a result we enjoy a close working relationship with many IVF and Fertility Clinics abroad.

We are able to support the needs of patients in the UK prior to their treatment abroad, including:

  • Pre-treatment tests for both partners
  • Monitoring of treatment cycles through scans and blood tests
  • Clinical back-up
  • Early pregnancy scanning

The CDS team is very experienced in co-ordinating patient management with the referring Clinic. Clinical back-up is provided by CDS associate consultant gynaecologists if required by the patient at any stage of their treatment.

Our flexible appointment times include early morning, early evening and weekends for the convenience of patients. We ensure test results are shared with clinics abroad in a timely manner.

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

What is it?

If cycle monitoring is not successful, the next step would be assisted reproductive technologies (ART). This is when medication is given to stimulate the growth of the ovarian follicles, which produce the eggs and important hormones. CDS offers modern ultrasound technology to assess a patient’s response to medication.

What can it show?

Advanced 2D and 3D transvaginal scanning (TVS) accurately measures follicle numbers, size and growth. The use of colour Doppler (blood flow) shows the maturity of the ovulatory follicle. Detailed imaging of the endometrial thickness and texture is crucial in assessing the response to the medication.

ART monitoring initially involves the simple timing of ovulation. If this is unsuccessful, it might lead on to IUI or IVF at a later stage.


IUI (intrauterine insemination) is carried out around the time of ovulation. It involves introducing sperm into the womb, close to the Fallopian tubes, to increase the chance of conceiving. A single cycle offers a 10-20% chance of conception, and multiple cycles (x3-5) of over 50%.*


IVF (in vitro fertilisation) is when an egg is fertilised by sperm outside of the body, then implanted into the womb. IVF-related techniques might also include procedures such as frozen embryo replacement or egg donation.

CDS are regarded as pioneers in ultrasound assessment of assisted conception cycles and offer considerable expertise in key areas of reproductive healthcare and fertility treatments.

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

*HFEA statistics 2018

What is it?

This involves a number of scans (typically 3-4) during a single, natural cycle that gives a comprehensive overview of the ovulatory cycle.

Advanced 2D and 3D (transvaginal) ultrasound scanning at CDS provides the basis for a very thorough evaluation of fertility status and diagnosis of gynaecological factors which might reduce or prevent the ability to conceive.

What can it show?

Serial scans allow close monitoring of the cycle, showing the development of the ovarian (egg) follicles and the lining of the womb (endometrium). This can confirm the timing of ovulation itself, identifying the fertile window for that month. These scans give us important information both leading up to and, crucially,  following ovulation itself. Cycle monitoring can help patients conceive, and also provides valuable information for any future treatments that might be needed.

Comprehensive scans during the ovulatory cycle can identify gynaecological disorders which may make it more difficult to conceive or prevent normal development of an early pregnancy.

CDS can also:

  • carry out ultrasound checks of the Fallopian tubes (HSS)
  • carry out advanced 3D ultrasound of the uterine cavity (SIS)
  • arrange relevant blood tests as part of cycle monitoring
  • organise semen analysis, and provide high definition testicular ultrasound

We provide flexible appointment times and can see patients in the early morning, early evening and weekends, as well as a choice of clinic location.

An in-depth, summary report is provided for the couple following completion of the cycle.

NOTE:  A significant number of patients will conceive within one or two monitored cycles where there is an absence of any gynaecological problem.

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

What is it?

CDS is recognised worldwide for our pioneering work in key areas of reproductive medicine and fertility.

We are able to offer our patients very advanced ultrasound imaging technologies, including:

  • 2D and 3D transvaginal (internal) scanning
  • Colour Doppler (blood flow) imaging
  • Gynaecological procedures
  • Virtual 3D ultrasound imaging

What do they show?

2D and 3D transvaginal (internal) scanning (TVS) have revolutionised and had a tremendous impact in the investigation and management of infertility.  Advanced ultrasound imaging can identify gynaecological problems which may affect fertility, or normal development of early pregnancy. Gynaecological disorders might include the presence of endometriosis, fibroids, disorders of the ovaries or anatomical abnormalities.

Colour Doppler (blood flow) imaging: Modern colour Doppler imaging shows very fine blood flow through organ tissues.  This allows adenomyosis (endometriosis within the muscle wall of the uterus) to be identified more clearly.  It can also show blood flow changes within the ovary which reflect hormonal activity and ovulatory changes without the need for blood tests.  Crucially, it also demonstrates the hormonal activity of the ovary essential for the development of early pregnancy.

Gynaecological procedures: 

Enhanced ultrasound examination of the Fallopian tubes (HSS/HyCoSy) and uterine cavity (SIS) shows their overall healthiness.

Using ultrasound as guidance is a very effective and safe technique for biopsy of the lining of the womb. This is of particular value in the investigation of implantation problems.

Virtual 3D ultrasound imaging: CDS has collaborated with Canon Medical Systems to create the very first virtual 3D imaging system in gynaecology, as part of the SIS procedure. It produces very detailed life-like pictures of the inside of the womb cavity. This is immensely valuable in assessing the healthiness of the womb lining, or identifying anomalies within the womb cavity which could affect fertility or cause miscarriage.

For general enquires and further information please see our Contact Page

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