our sonographer is awesome and has been doing it for well over 20 years, he did DDs scan and was right, he did the scan for this one and was even more sure BUT he did admit that to his knowledge he had been wrong ONCE! I have kinda comitted to the sex of this baby and i think il will be truely shocked if it comes out different!
They do get it wrong sometimes, and like everyone has said its easier to be told a girl and have a boy appear!

If it does turn out to be a boy you have to share your girls name cause im very curious!