Besides the fact that, like other's have pointed out, the chances for a girl are about 50/50 (i think a bit less, there's slightly, but significantly more males born) and so things are not really THAT shocking,
I don't really get the link between having a girl and a show of female empowerment, and what's supposed to be shocking about that link? In all seriousness, The Chosen Slayer, why do you think it would be more in line with a show about female empowerment to have a boy? I'm just really curious because I don't see it at all how you got there.