nub and skull theory

[Mommaoftwo]

errior

[flora15]

I have a question about the skull theory. I had the feeling my baby is a girl, but after the scan I saw the skull and think it will be a boy. But is the skull theory even reliable? I know the nub is, but that was too early (11 weeks), I read the skull theory is 50-50? Do I still have a change it will be a girl?