Websites on Research:
Australian Twin Registry
Includes a newsletter, registry for twins, study information and conferences.
The Center for Study of Multiple Birth
Recognized internationally as a unique resource for research and information about the causes, effects and problems of multifetal pregnancy.
International Society for Twin Studies
Events, journal, bylaws, membership information.
Millennium Twins
A longitudinal sociological study of twins born in the new millennium.
Sleep Research Study for Twins
The University of Pennsylvania is recruiting same-sex twins living in the eastern time zone who are between the ages of 25 and 59 to participate in a sleep research study. [PDF]
Twin Research
Newsletter, research information, survey.
Twin Research
Newsletter, research information, survey.
Twin Research and Genetic Epidemiology
Located at St Thomas' Hospital, London, UK.
Twin Studies
From the Institute of Behavioral Genetics at the University of Colorado. A handful of studies for twins of all ages.
Twins Personality Survey
A twin survey on personality, conducted by researchers at Virginia Commonwealth University.