Beyond technology ... Do I want to know? Before modern technology allowed expectant parents to determine the sex of their babies prior to birth, eager moms and dads devised interesting ways to figure it out. Are you carrying high? It’s a girl. Carrying low? Must be a boy. If you’re gaining weight in your face, it’s a girl. No? Paint the nursery blue! Everything from a ring on a string to urine examination (don’t ask) were used in an attempt to satisfy their curiosity.