The association between the fraternal birth order effect in male homosexuality and other markers of human sexual orientation

Article


Rahman, Qazi 2005. The association between the fraternal birth order effect in male homosexuality and other markers of human sexual orientation. Biology letters. 1 (4), pp. 393-5.
AuthorsRahman, Qazi
Abstract

Later fraternal birth order (FBO) is a well-established correlate of homosexuality in human males and may implicate a maternal immunization response in the feminization of male sexuality. This has led to the suggestion that FBO may relate to other markers of male sexual orientation which are robustly sexually dimorphic. If so, among homosexual males the number of older brothers should strongly correlate with traits such as spatial ability and psychological gender, indicative of greater behavioural feminization, compared to heterosexual males. The present study failed to find significant associations between number of older brothers and these traits.

Keywordshomosexuality; fraternal birth order; older brothers; mental rotation; psychological gender; maternal immune hypothesis
JournalBiology letters
Journal citation1 (4), pp. 393-5
ISSN1744-9561
Year2005
Publisher's version
License
CC BY-ND
Web address (URL)http://hdl.handle.net/10552/252
Publication dates
PrintDec 2005
Publication process dates
Deposited12 Aug 2009
Additional information

Citation:
Rahman, Q. (2005) ‘The association between the fraternal birth order effect in male homosexuality and other markers of human sexual orientation ' Biology letters 22;1(4) 393-5.

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