According to David Puts, a professor in the Department of Anthropology at Pennsylvania State University, who was not involved in the latest research, the study adds to a growing body of evidence indicating that prenatal sex hormones, especially male hormones such as testosterone, play a role in the development of later sexual orientation. Valentine's Day dating tips from lovestruck scientists. Request Reprint or Submit Correction. The research team also conducted the same experiment with 14 pairs of male identical twins where one was straight and one was gay. As such, it is not clear whether there is any real difference in the level of testosterone exposure between straight and gay men or how testosterone exposure might map on to sexual orientation differences. Sex cues ruin men's ability to make decisions.
This article has been updated to include additional comments from David Puts.
Can Finger Length Provide Clues About Your Sexuality?
However, they found no such association in this case. Order by newest oldest recommendations. In addition to being disheartened, you probably also found checking your fingers for length a bit familiar: A pregnant astronaut would be bombarded with energetic particles on a trip to Mars, raising her unborn child's risk of cancer and infertility. Topics Cancer research Shortcuts.