Finger-length ratios and sexual orientation

摘要: Measuring people's finger patterns may reveal some surprising information. Animal models have indicated that androgenic steroids acting before birth might influence the sexual orientation of adult humans. Here we examine androgen-sensitive pattern lengths1, and find evidence homosexual women are exposed to more prenatal androgen than heterosexual are; also, men with one older brother, who likely first-born males be in adulthood2, eldest sons. Prenatal androgens therefore human both sexes, a mother's body appears ‘remember’ previously carried sons, altering fetal development subsequent sons increasing likelihood homosexuality adulthood.