Sent our 12 week ultrasound scan to a few friends who asked to see it and two have used nub theory to predict it's a boy. A little annoyed the more I think about it because I'm not finding out the gender and wanted a surprise but one friend keeps saying yes definitely boy I'm telling you it's a boy, after telling her again I don't want to find out. Just wonder if it's pointless waiting for a surprise at birth when I feel like I've already been told anyway.