The study, published in in 2012, used 40 female and 40 male heterosexuals with an average age of just over 19 — university students, mainly. They presented each person with 3-D computer ...

About 1.7 percent of the population is intersex and don’t fit neatly into male and female boxes, according to InterAct, an advocacy organization for intersex youth. That’s as common as having ...

In this case, five out of 72 genetically male embryos developed female sex organs. “No dietary influences on sex development have ever been established scientifically before,” Peter Koopman, ...