A genomic interrogation of homosexuality turns up speculative links between genetic elements and sexual orientation, but researchers say the study is too small to be significant. 

The virus can be transmitted by unprotected anal sex between men, according to a CDC report.

In a small study of male twins, nine methylation sites helped researchers predict a person’s sexual orientation.

The largest study yet of the genetic roots of homosexuality links sexual preference in men to two regions of the genome.

Meet some of the people featured in the July 2014 issue of The Scientist

Scientists who study the biological roots of sexual orientation should continue working with educators, policy-makers, and the public to put their data to good use.

Researching the causes of sexual orientation should be guided by scientific, not social, concerns.

Sex is an inherently fascinating aspect of life. As researchers learn more and more about it, surprises regularly emerge.

Watch NIH researcher and Critic at Large Dean Hamer describe the nuances of his research into the genetics of sexual orientation.

A round-up of recent discoveries in behavior research