Lesbian Physiology Differs, Study Says

Scientists reported the first strong physiological evidence that lesbian and bisexual women may be biologically different from heterosexual women. Researchers at the University of Texas in Austin found that the hearing of homosexual and bisexual women tends to be a bit more like that of men. The findings suggest that homosexual and bisexual women develop in subtly different ways than heterosexual women. Therefore, their brains may also form differently, accounting for their sexuality, the researchers said. “It’s an indication that other brain sites have also been masculinized,” said Dennis McFadden, a professor of experimental psychology who led the study reported in the Proceedings of the National Academy of Sciences. The study is the latest to come from the controversial investigation into whether homosexuality has a biological basis.