This article examines the genesis of sexual preference. Since human beings as a species are unique in that they have a sexual orientation toward their own gender (homosexuality) as well as the opposite sex (heterosexuality), how or where this preference begins is of interest. This paper examines the research and focuses on how and why some fetuses lack male hormones at the end of pregnancy, which along with stress responses may trigger a high level of activity in the mother's adrenal glands impacting the developing child's later sexual orientation. Options for future research are also discussed.
KEY WORDS: Sexual orientation, heterosexuality, homosexuality, bisexuality.
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Primal Health Research Center, London, England