Join a current study

Are you a twin or triplet? A very precious gift that only you can give is the donation of your time to a twin study. By participating in twin studies, you'll be helping researchers to better understand what contributes to our health and happiness.

Below are our latest studies seeking twins and triplets. You'll find there are many ways to get involved - and often it is as simple as completing a questionnaire but this can be invaluable to research.

If you are interested in any, please click on the individual study link. We'll get back to you with further details. If you'd like to be alerted when a new study begins, please contact us. TRA and our researchers appreciate your time and interest.

Learn about findings from our COVID-19 research HERE. To enrol in the study, see below.


Influences on decision making study

Eligibility: All twins – identical and non-identical - aged 18-65 years. Have you ever wondered to what extent the everyday decisions that you make are determined by your genetics? To what extent i... Read more >

Twins breast cancer study

Eligibility: Identical and non-identical female twin pairs, aged 18 years and above, in which one twin or both twins has had breast cancer. This study could benefit all women by clarifying the geneti... Read more >


Eligibility: Open to adult twins of any zygosity as well as parents of twins aged 1-17 years. Participants must be members of Twins Research Australia.  Twins across Australia are invited to par... Read more >

Twins FluTracking Survey

Eligibility: Open to twins and higher order multiples (HOMs) of all ages – identical and fraternal - and parents of twins/HOMs. This special Twins FluTracking Survey enrolment has been develop... Read more >

Neurodevelopmental disorder study

Eligibility: identical twin pairs, younger than 25 years of age, who are differently affected by epilepsy, cerebral palsy, autism or an intellectual impairment. Neurodevelopmental disorders like epil... Read more >

The resilience study (Twin-10)

Eligibility: Previously participated in 'The Emotional Well-being Project'.  This study aims to identify the psychological and brain factors that contribute towards resilience over a 10-year and... Read more >

Men's health questionnaire

Eligibility: all male twins 18+ years of age.  Australian males experience poorer health compared with Australian females. They have a shorter life expectancy and are at greater risk of developi... Read more >

Health and lifestyle questionnaire

Eligibility: twins of all ages The Health and Lifestyle Questionnaire will be used to help research. It is a questionnaire developed for TRA members and asks about a range of topics including me... Read more >

Older Australian twins study: amyloid imaging

Eligibility: twins & multiples aged 65+ years, living in VIC or NSW.  A known predictor in brain ageing is 'plaques' which contain the amyloid protein. It is not known however what causes th... Read more >

Menopause and bone health

Eligibility: female twins aged 60+ years, living in VIC.  The purpose of the study is to understand how bone structure changes during menopause and how hormonal factors contribute to bone loss a... Read more >

TANDEM study (juniors)

Eligibility: identical twins aged 9-15 years.  This project is investigating how temperament develops over time, with a particular focus on the period of late childhood through to mid-adolescenc... Read more >

Twins Research Australia

Address: 3/207 Bouverie St
Carlton, Vic 3010

Freecall: 1800 037 021


ABN: 84 002 705 224

Twins Research Australia is a national resource supported by a Centre of Research Excellence Grant from the National Health and Medical Research Council and housed within the University of Melbourne.

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