Developmental Biology

Sexual orientation "hard-wired" before birth

Published in Women's Health Weekly, October 23rd, 2003

The results of a new study by a team of British psychologists provide powerful new evidence that sexual orientation is "hard-wired" in the human brain before birth.

Dr. Qazi Rahman of the University of East London (UEL) has been working with Drs. Veena Kumari and Glenn Wilson of the Institute of Psychiatry to investigate sex differences in the startle response - our eye-blink reaction to sudden loud noises.

The team discovered significant differences in the response between male and female, and heterosexual and homosexual subjects. Because the startle response is known to be involuntary rather than learned, this strongly indicates that sexual...

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Source: Women's Health Weekly (2003-10-23)

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