World Wide Twin's catalogue

The Worldwide Twins’ Data Catalogue is comprised of information from a number of twin registries and cohorts.


Join the catalogue

If you can contribute information about your twin registry or cohort, please fill out this survey.

Please note that our purpose is to provide information on available resources. We do not own or store any data.


Participant twin registries and cohorts:

Name of registry 


Brazilian Twin Registry Brazil
California Twin Program USA
Danish Twin Register Denmark
International Twin Study USA
Iranian Twin Registry Iran
Italian Twin Registry Italy
Finnish Twin Cohort Finland
Hungarian Twin Registry Hungary
Malaysian Twin Registry Malaysia
Murcia Twin Registry Spain
Netherlands Twin Registry The Netherlands
Osaka University Twin Registry Japan
Sri Lankan Twin Registry Sri Lanka
Twins Research Australia Australia
Twins UK United Kingdom
Washington State Twin Registry USA