St Thomas UK Adult Twin Registry
The Centre for the Study of Multiple Birth
The Queensland Institute of Medical Research
Institute of Behavioral Genetics, University of Colorado
International Society of Twin Studies
Multiple Birth Foundation (UK)
Netherlands Twin Register (NTR)
The Southern California Twin Project
Twins Study - Chronic Fatigue Syndrome
Virginia Institute for Psychiatric and Behavioral Genetics
National Academy of Sciences – National Research Council (NAS-NRC) Twin Registry
Northern California Twin Registry
The Massachusetts Twin Registry
Twins and Multiples (Australian website on educating twins, triplets & more)
Australian Multiple Birth Association (AMBA)
Centre for the Study of Multiple Birth (USA)
National Organization of Mothers of Twins Club (USA)
National Organization of Fathers of Twins Club (USA)
Twinless Twins Support Group International
Twins and Multiple Birth Association UK (TAMBA)
Multiple Birth Association of Western Australia
Waverley Multiple Birth Association
Multiple Births: Prenatal Education & Bereavement Support
Twinless Twin Support Perth WA
Please note any statements and views made on the following pages do not reflect the views and opinions of the Australian Twin Registry. These lists and pages are privately owned and the links below are solely provided as a potential source of support for twins and families of twins.