With my daughter, after having my 20 week scan and looking at the photo I was convinced I was having a girl until one of the women I work with, who use to be a nurse said no it could be a boy because of such and such, so then convinced myself for the rest of the pregnancy we were having a boy. I though she'd know as she was a nurse!!!!
The best surprise in the world finding out she was a girl.
This pregnancy is so like my last in so many ways, even down to things happening on the same day of pregnancy that it makes me think it might be a girl again. I'm having my scan tomorrow and we are remaining team green, but I hope I might be able to get a bit of an idea from the photo.