I've said:
Back in the day, nobody knew the gender of an unborn baby, but after birth, everybody could tell the gender.
In today's world, everybody knows the gender of an unborn baby, but after birth, no one can tell the gender!
YOU'LL FIND THAT OUT WHEN THEY GROW UP AND TELL YOU WHICH GENDER THEY IDENTIFY WITH. YOU HAVE A BEAUTIFUL BABY, MRS. SMITH. DOCTOR, DID I HAVE A BOY OR A GIRL?