What to know about President Donald Trump's order targeting the rights of transgender people

One of President Donald Trump's executive orders offers a new federal government definition of the sexes that could have a major impact on transgender people. It calls for the government to define sex as only male or female. It rejects that people can transition between genders, or that they can be nonbinary or intersex. It declares that sexes are defined at conception based on reproductive cells — large ones in females or small ones in males. That's a problem scientifically, because such cells don't exist at conception. Egg cells don't develop until many weeks later, and sperm cells aren't produced until puberty. Courts could have the final word.