I guess I just don't understand what the problem is. Sacred? The gender of the baby is supposed to stay secret?
I had 2 ultrasounds when pregnant with my first child. They told us both times it was a girl. When the baby was born, my mother-in-law told all her friends the baby had a birth defect - she had a penis!
My MIL is a hoot. Poor baby is 18 now and just can't live that down.