Trump’s order says it is intended to protect women’s spaces from those who “self-identify” as women. It defines the sexes in an unconventional way, based on the reproductive cells — large cells in females or small ones in males. And it suggests that humans have those cells at conception.

President Donald Trump on Monday signed a sweeping executive order relating to the rights of transgender people, making good on his campaign promise to “end this transgender lunacy” on his first day in office.