"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

Physical gender is not always just a matter of XX ... to stimulate masculinizing puberty. Like Klinefelter Syndrome, Turner Syndrome is marked by an abnormal karyotype, 45,XO.

Luke Boisvert of Nashua, a 13-year-old transgender male, said a proposed ban on minors receiving hormone treatments or ...