Our colleague, Dr. Jed Diamond, wrote a powerful blog post recently that begins: “It’s good we recognize that not all humans are either XX or XY, but we shouldn’t forget that the exceptions are few. According to the World Health Organization, humans are born with 46 chromosomes in 23 pairs. The X and Y chromosomes determine a person’s sex. Most women are 46XX and most men are 46XY. “Research suggests …
















