Dolly
Hard to say de lah. Maybe yr sonographer is the quiet type, dun wan say anything de.. For my #1, my gynae also never guess. Only tell me during 4th month u/s. This time round #2, cos she knows me quite well le mah. So a bit more talkative; she asked if want her to guess anot. Wait till 4th month scan, clearer.
My friend experienced sth like this, she is due next year Jan 2011. She went thru 12weeks u/s, gynae said boy cos can see tiny birdie.
14weeks u/s (her gynae do fortnightly u/s for 1st trimester de), her gynae confirmed again its a boy.
Come 16weeks, her gynae then said, confirm girl.