Today I was listening to an advertisement for some pharmaceutical, when I heard the announcer say, "do not take if you were assigned female at birth." Notice the wording "if you were assigned female at birth," rather than simply "if you are female." The idea of being assigned a "gender" at birth is that the doctor can't possibly know your real "gender" so he simply "assigns" you a gender. But if that were the case, why would the efficacy of the drug depend on the gender that you were arbitrarily "assigned" at birth and not your "real" gender?