Millions of people do not fit neatly into male or female sex designations at birth, and wrong identification can set them up for a lifetime of physical and mental harm.

New research looks at correlations between douching and the use of products like tampons and pads to concentrations of volatile organic compounds in the blood.

Vulvodynia, or chronic, debilitating vulvar pain, affects an estimated 16 percent of women over their lifetimes. New research identifies risk factors.