This Article
Right arrow Full Text (PDF)
Right arrow Submit an eLetter
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by King, M.
Right arrow Articles by McDonald, E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by King, M.
Right arrow Articles by McDonald, E.

The British Journal of Psychiatry 160: 407-409 (1992)
© 1992 The Royal College of Psychiatrists

Homosexuals who are twins. A study of 46 probands

M King and E McDonald
Royal Free Hospital School of Medicine, London.

Forty-six homosexual men and women who were twins took part in a study of their sexuality and that of their co-twin. Discordance for sexual orientation in the monozygotic pairs confirmed that genetic factors are insufficient explanation of the development of sexual orientation. There was a high level of shared knowledge of sexual orientation between members of twin pairs, and a relatively high likelihood of sexual relations occurring with same sex co-twins at some time, particularly in monozygotic pairs. The implications of these results for the study of the origins of sexual orientation and for twin research are discussed.


This article has been cited by other articles:


Home page
 NEJMHome page
R. C. Friedman and J. I. Downey
Homosexuality
N. Engl. J. Med., October 6, 1994; 331(14): 923 - 930.
[Full Text]

Home page
 Arch Gen PsychiatryHome page
J. M. Bailey, R. C. Pillard, M. C. Neale, and Y. Agyei
Heritable Factors Influence Sexual Orientation in Women
Arch Gen Psychiatry, March 1, 1993; 50(3): 217 - 223.
[Abstract] [PDF]

Home page
 Arch Gen PsychiatryHome page
W. Byne and B. Parsons
Human Sexual Orientation: The Biologic Theories Reappraised
Arch Gen Psychiatry, March 1, 1993; 50(3): 228 - 239.
[Abstract] [PDF]

Home page
 Sex AbuseHome page
R. Langevin
A Comparison of Neuroendocrine and Genetic Factors in Homosexuality and in Pedophilia
Sexual Abuse: A Journal of Research and Treatment, January 1, 1993; 6(1): 67 - 76.
[Abstract] [PDF]