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.


The Victorian Population Twin Cohort Study

Eligibility: All twins born or living in Victoria. Data routinely collected by State Governments (such as hospital data) are increasingly being used in health research. Twins are often excluded from ... Read more >

How does diet impact male reproductive health?

Eligibility: Identical and fraternal, healthy male twins - aged 18-45 years. We have seen a shift in dietary patterns with increased consumption of processed, easily accessible foods. Minimal attenti... Read more >

Genetics of risk for and resilience to mental health problems

Eligibility: Only twins who previously participated in the “Resilience and vulnerability to mental health problems’” in 2021-2022. Thank you to those members that participated in our rece... Read more >

Australian Twins & Sisters Mammographic Density Study Follow-Up

Eligibility: Identical and fraternal female twins who previously participated in the Australian Twins and Sisters Breast Density Study (2005-2007).   Breast cancer is the most common form o... 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 >

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 >

Twins Research Australia

Address: 3/207 Bouverie St
Carlton, Vic 3010


ABN: 84 002 705 224

Twins Research Australia has received continuous funding from the National Health and Medical Research Council (NHMRC) since 1981, most recently through a Centre of Research Excellence Grant (2015-2022). TRA is administered by the University of Melbourne.

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