I wouldnt take guesses from 12 weeks as gospel, especially if they were not from a professional. One of my friends said a girl, then literally the next day changed to a boy for me from my '12w' scan at 14 weeks and I just smiled and carried on. People base guesses from their own pregnancies but it doesn't mean it's necessarily the same for everyone else. I don't believe in all the old wives tales to determine gender either xx