A person's sex can be considered across various levels. To illustrate, genes, hormones, and
genitalia can all be considered physical markers of a person's sex. In addition to physical …

The process of fetal sexual development is under intricate genetic and hormonal control;
many factors that are involved in the process largely escape our understanding. In the …

Many people believe that sexual orientation (homosexuality vs. heterosexuality) is
determined by education and social constraints. There are, however, a large number of …

Despite enormous advances in the understanding of the molecular mechanisms of sexual
differentiation, the medical decisions made in patients with disorders of somatosexual …

Differences between males and females are widely represented in nature. There are gender
differences in phenotypes, personality traits, behaviors and interests, cognitive performance …

We review research supporting biological mechanisms in the development of sexual
orientation. This research includes studies on neural correlates, prenatal hormones and …

Boys and girls, and men and women show consistent differences, on average, in interests,
activity preferences, and social styles. This article summarizes sex differences in human …

Both sexual orientation and sex-typical childhood behaviors, such as toy, playmate and
activity preferences, show substantial sex differences, as well as substantial variability within …

Hughes IA, Coleman N, Faisal Ahmed S, Ng K‐L, Cheng A, Lim HN, Hawkins JR. Sexual
dimorphism in the neonatal gonad. Acta Pædiatr 1999; Suppl 428: 23–30. Stockholm. ISSN …

Several biological mechanisms have been proposed to influence male sexual orientation,
but the extent to which these mechanisms cooccur is unclear. Putative markers of biological …