Welcome to the International Society for Twin Studies!

The International Society for Twin Studies (ISTS) wants to further research and public education in all fields related to twins and twin studies, for the mutual benefit of twins and their families and of scientific research in general. The Society was founded in Rome in 1974 and is an international, nonpolitical, nonprofit, multidisciplinary scientific organization.

The journal of the Society, Twin Research and Human Genetics, covers all areas of human genetics with an emphasis on twin studies, heritability, genetic epidemiology, psychiatric and behavioral genetics, and research on multiple birth in the field of epidemiology, genetics, endocrinology, fetal pathology,  obstetrics and pediatrics.

19th International Congress on Twin Studies 11–14 November, 2021, Budapest, Hungary


Hybrid Conference
The International Society for Twin Studies (ISTS) and International Council of Multiple Birth Organisations (ICOMBO) welcome you to join us in Budapest 11-14 Nov 2021, either in person or virtually, for the 19th International Congress on Twin Studies. Local host is the Hungarian Twin Registry. 

  • On-site location: Semmelweis University, Basic Medical Science Center,
    H-1094 Budapest, Tözoltó utca 37-47.
  • Online: via FLOOR platform


Registration fee
ISTS members and undergraduate students: free
Non-ISTS-members: via ISTS membership:

  • Full members: AUD180/~EUR115/~USD130
  • Student members: AUD100/~EUR65/~USD75
  • Non-professional/retired: AUD140/~EUR90/~USD105


Registration: 5 Nov, 2021
Abstract submission: 20 Oct, 2021

For further information, please visit the congress website: twins2021.org

Email: info@twins2021.org