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‘I couldn’t believe it when I found out that there was a charity that deals with HG. I actually broke down, at last what I had seemed valid.’ - a hyperemesis gravidarum sufferer

International Consensus for an HG Definition and Core Outcome Set for future research

A brilliant team in The Netherlands, whom we had the pleasure to meet at the International NoHype Conference in 2015 are conducting a Delphi study to establish an internationally agreed definition for HG and Core Outcome Set to enable better, more effective research for future generations. Our Chairperson, Caitlin Dean, is involved in the project on the steering group panel.

Recruitment amoung patients has been superb (and slightly overwhelming) but we desperately need more GPs, midwives, nurse, obstetricians and dietitians to represent their stakeholder groups. If you are interested in taking part you can register your interest here and read more about the project below.




Definition and Core Outcomes for Hyperemesis Gravidarum


Why is this research needed?

Hyperemesis gravidarum (HG) has significant consequences for maternal wellbeing, is associated with adverse birth outcomes and leads to major health care costs. Treatment options are symptomatic and hampered by the lack of effective, evidence-based options. One of the reasons for this lack of evidence is the use of a broad range of HG definitions and outcome measures. This makes it difficult to compare trial results. As a consequence, doctors may not know how to approach and treat HG patients. We believe an international consensus statement of all important stakeholders is needed. This consensus on HG definition and outcomes measured in trials would facilitate meta-analysis and implementation of trial results in guidelines, to ultimately improve care for women and their offspring.


What does the Delphi Study involve?

All important stakeholders, including researchers, obstetricians, patients, carers, midwives, general practitioners, dieticians and nurses are invited to participate in the process of item selection for inclusion in the HG definition and core outcome set. This selection process will take part over four survey rounds between June and September 2016. They all take no more than 10- 15 minutes of your time. If you would like to take part it is important that you complete all rounds.

Your participation will be of great importance for the success of this project. We appreciate your input as it is vital for the future of HG research. Your participation is voluntary and you can always withdraw from the study at any time. If you are a patient, your participation will not affect your healthcare.


All data gathered during this project will be handled with confidentiality and saved under code without your contact details. Only the Investigator has access to the data. The results of this study may be published as a scientific paper and if so, all data will be anonymized. Please contact lead researcher Iris Grooten if you have any questions by email: or telephone: (0031) (0)20 5668483.




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