Homosexual women are, on average, more masculine in their appearance and behavior than heterosexual women. We hypothesized that their masculinity was influenced by exposure to elevated levels of prenatal androgen during early development. We recruited 199 women (including 67 homosexual women) and measured their masculinity via self-report and observer ratings. Our measure of prenatal androgen exposure was the ratio of the index to ring finger (2D:4D), which is hypothesized to be lower in women exposed to elevated levels of androgens during prenatal development. The included data covers these 199 women and includes their demographic information (age, race, sexual orientation), their self-reported gender nonconformity for childhood and adulthood as measured on the Childhood Gender Nonconformity Scale and Continuous Gender Identity Scale respectively, their observer-rated masculinity, and measurements of their digit lengths by trainees.

This data was gathered from 199 women of varying sexual orientations, recruited from gay pride festivals and volunteer lists. Demographic information are their self-reported age and ethnicity, as well as their sexual orientation reported on the Kinsey Scale. Gender nonconformity data consists of two self-report scales: the Childhood Gender Nonconformity Scale and Continuous Gender Identity Scale, as well as ratings given by neutral observers to short video clips of the participants talking about the weather. Residuals are also included for this data, to assess the degree of variance and its relationship with sexual orientation. Finger length ratio data (2D:4D) is provided as measurements performed by at least two trained raters. For further information on individual variables, please see the second worksheet on the data set.