Yeah i agree, often sonographers are so skilled they only need a flash () to work it out. There were 2 sonographers at my 20 wk scan, one was a trainee. We didn't want to know the sex and i was watching the screen like a hawk. I didn't see anything, i had a girl and they both knew from whatever brief glimpse they had!

I thought, as you did, that b/c they knew from such a quick glimpse i was having a boy, but no, a little girl!