OBJECTIVE Sexual orientation is usually considered to be determined in early life and stable in the course of adulthood. In contrast, some transgender individuals report a change in sexual orientation. A common reason for this phenomenon is not known. METHODS We included 115 transsexual persons (70 male-to-female "MtF" and 45 female-to-male "FtM") patients from our endocrine outpatient clinic...

The purpose of this study is to determine whether physician knowledge of sexual orientation is associated with increased patient satisfaction in LGB males and females in Milwaukee, Wisconsin. Data were collected during Milwaukee Pride Fest 2007, a festival celebrating lesbian, gay, bisexual, and transgender (LGBT) persons. Chi-squared analyses were then computed to determine if physician knowle...

Previous research has shown that lay people can accurately assess male sexual orientation based on limited information, such as face, voice, or behavioral display. Gender-atypical traits are thought to serve as cues to sexual orientation. We investigated the presumed mechanisms of sexual orientation attribution using a standardized set of facial and vocal stimuli of Czech men. Both types of sti...

OBJECTIVE Although previous studies have suggested that sexual orientation is influenced by familial factors, which may be partly genetic, these studies have relied on unrepresentative and potentially biased samples. The authors attempted to estimate the role of genetic and environmental factors in the determination of sexual orientation in a more representative sample. METHOD Sexual orientat...