Our team


Our team is made up of medical and scientific specialists, who are all dedicated to giving a comprehensive and caring service. We work within the Assisted Conception Unit (ACU) and the Clinical Genetics Unit, with the help of a large team that provides care for all patients who use our specialised services. A number of the ACU staff will usually be involved in your care. You may not meet everyone listed below, but they will be working alongside the dedicated PGD team.

Genetic counsellors and doctors

You will meet a senior pre-implantation genetic diagnosis (PGD) genetic counsellor or clinical geneticist, and sometimes an ACU nurse or doctor on your first visit. The clinical genetics service works closely with the ACU to ensure that you receive the most comprehensive information available.

  • Professor Frances Flinter, consultant clinical geneticist and Caldicott guardian
  • Sarah Ross, genetic counsellor
  • Eshika Haque, genetic counsellor
  • Genevieve Say, genetic counsellor
  • Tazeen Ashraf, clinical genetics registrar


The ACU nurses plan your treatment schedule and teach you about any medications used in your treatment. The nurses perform ultrasound scans, blood tests and assist in egg collection and embryo replacement procedures. They look after you during and after the procedures involved in your treatment and offer support and advice by telephone. The main nurses involved with PGD are:

  • Rachel Dyer

  • Ali Marqueses
  • Alice Denga, matron


You will meet a PGD doctor on your second visit to us. Our team of doctors will oversee all aspects of your treatment in the unit and perform ultrasound scans, egg collection and embryo replacement.

  • Mr Yacoub Khalaf, Director of the pre-implantation genetic diagnosis  (PGD) programme

  • Dr Jan Grace, consultant in reproductive medicine

  • Dr Tarek El-Toukhy, consultant in reproductive medicine

  • Dr Mohamed Khalil, subspeciality trainee in reproductive medicine


The embryologists work in the clinical embryology laboratories with our team of dedicated and highly skilled scientists who will look after and care for your eggs, embryos and sperm in our modern and state-of-the-art laboratories. They will perform all the procedures from checking the quality of the eggs and sperm, to fertilisation. They will use the appropriate techniques, for freezing and storage of material where appropriate, for future use. Our embryologists are also trained to conduct biopsy embryos for pre-implantation genetic diagnosis cycles.


A team of scientists in the laboratory perform the important chromosome or genetic testing for PGD cases. You are likely to meet them during a treatment cycle before embryo transfer.

  • Dr Pamela Renwick, consultant clinical scientist
  • Professor Caroline Ogilvie, consultant cytogeneticist

  • Dr Elaine Ronaldson/Jane Trussler/Leanne Willoughby/Dr Heema Patel - molecular scientists
  • Dr Angela Davies, senior molecular cytogeneticist
  • Susan Bint - molecular cytogeneticist 

Administration team

A member of the ACU administration team will probably be the first person you meet when you come to the unit. They are responsible for keeping your records, answering initial queries and making sure a doctor or nurse responds to your questions when appropriate.

  • Helen Markham, PGD and specialised services co-ordinator

Contact us

General enquiries
Tel: 020 7188 1392
Email: pgdgenetics@gstt.nhs.uk

In treatment
Tel: 020 7188 2300
Email: IVF.PGD@

Assisted Conception Unit

Or Assisted Conception Unit is one of the leading innovators in the field of fertility and a trusted choice for people trying to conceive.