With our first 3 girls, we couldn't tell the sex from the ultrasound; sonograms have come a looooong way since the eighties! After that, we had 4 boys and a girl and we knew ahead of time. With the boys, it was like they were doing a fetus porno show. "Here it is...and here it is from another view...and I'll flip over so you can see it again!"
No, with us, there was never any question about the males..