Deputy Director for Behavioral and Social Science, Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention
Not Clearly Pro or Con to the question "Is Sexual Orientation Determined at Birth?"
"The origins of sexual orientation are complex and multiply determined, but data clearly supports a role of genetics, biology, and social processes. Sexual orientation undoubtedly feels inborn to many people, particularly males. The development of sexual orientation is likely different for males and females, as is seen in a variety of different types of research with humans and with different species of animals."