Caitlin Dean is a Registered General Nurse specialising in hyperemesis gravidarum and currently undertaking her PhD at the Academic Medical Centre in Amsterdam. In addition to her research she is the chairperson for the UK charity Pregnancy Sickness Support and is considered a national spokeswoman for the condition. Caitlin writes prolifically for the lay and medical press and on her popular blog about the condition, Spewing Mummy, and in 2015 she published her book Hyperemesis Gravidarum - The Definitive Guide, followed by a children's book How to be an HG Hero.

Marian Mc Bride is a Dietitian with an interest in maternal nutrition and women's health. She works in a maternity hospital providing dietary education and support to manage acute and chronic conditions in pregnancy, including those with hyperemesis gravidarum.

Rotunda Hospital, Dublin

Åse Vikanes is consultant at Meidell-Vikanes Gynklinikk in Oslo and senior research fellow at the Intervention Centre Oslo University Hospital, Norway.

Since 2005 Vikanes has studied causes and consequences of hyperemesis. Her main focus has been transferal of hyperemesis over generations, associations between hyperemesis and ethnicity, pregnancy outcomes, and cancer in mothers and children. Ongoing projects are exploring associations between hyperemesis and maternal mental health and cardiovascular risk, in addition to neurodevelopmental diseases in offspring.

Vikanes and Trovik are responsible for the Norwegian national guidelines for hyperemesis treatment, and for arranging the first international hyperemesis-conference in Bergen in 2015.

After suffering with Hyperemesis Gravidarum, Margaret set up the website www.pregnancysicknesssos.co.uk in 2010 to disseminate the information that she had gathered while researching HG in preparation for pregnancy. She has since conducted and published surveys of women's experiences of HG in the UK. She has volunteered for PSS since 2011 and is a co-author on the Royal College of Obstetricians and Gynaecologists clinical practice guidelines for Nausea and Vomiting of Pregnancy and HG. She is currently the Patient and Public Involvement and Engagement in Research Lead for University Hospital Birmingham.

Catherine Nelson-Piercy is a Consultant Obstetric Physician at Guy’s and St. Thomas’ Hospitals Trust and Queen Charlotte’s and Chelsea Hospital in London. In 2010 she was awarded the title of Professor of Obstetric Medicine at King’s College London. Her undergraduate studies were at King’s College, Cambridge University and St Bartholomew’s Hospital. She trained as a physician, and was taught Obstetric Medicine by Professor Michael de Swiet.

Professor Nelson-Piercy is the immediate past President of the International Society of Obstetric Medicine (ISOM). She is founding co-editor in chief of the journal ‘Obstetric Medicine: the medicine of pregnancy.’

Professor Nelson-Piercy has been involved in the development of several evidence-based National Guidelines notably for “Contraception in Women with Heart Disease”, BTS / SIGN “Asthma in Pregnancy” and RCOG Green top guidelines on “Reducing the risk of thromboembolism during pregnancy, birth & the puerperium” and ‘Management of nausea vomiting of pregnancy and hyperemesis gravidarum”. She has over 200 publications and has edited five books and written the successful Handbook of Obstetric Medicine, now in its fifth edition. She is also one of the central physician assessors for the UK Confidential maternal deaths enquiry.

Hyperemesis Education and Research (HER) Foundation (United States (US) and international charity)

Jone Trovik is a gynaecologist, consultant at the Department of Gynaecology, Haukeland University Hospital, Bergen and professor at the Department of Clinical Science, University of Bergen, Norway.

She has been treating women with Hyperemesis for many years, focusing on improving care including appropriate use of antiemetics and nutrition.

Trovik is a former leader of the Norwegian Society for Gynaecologists and Obstetricians, and hosted the first world colloquium of Hyperemesis in Bergen 2015.

Haukeland University Hospital, Bergen, Norway

Deirdre is an Irish nurse and midwife, founded the Global Village of Midwives and Global Village Network Community. MD of Health Service Design Ltd. Deirdre is an international change agent and passionate about research, co-design and implementation methodology to improve care together.

Deirdre Munro RGN, RM, HDip Midwifery, QFA, MHSc Health Systems & Research, International Fellow ECPD, Certified Change Agent.

BSC(Hons), PhD, DClinPsy.

Helen is a Clinical Psychologist and Honorary Senior Lecturer at Cardiff University. In her role as Senior Clinical Tutor on the South Wales Doctoral Training Programme in Clinical Psychology, Helen supervises doctoral research on the psychological consequences of HG.