Here's an article about a family in Sweden that's keeping the sex of their kid secret. Which reminds me of this story except of course it's in real life. (Don't read the comments, btw.)

Well, maybe read the comments. Some of them make reference to David Reimer, and - as I've actually read his book - I'm not so sure of the relevance. His problems seem to me to be much deeper than simply being raised as a girl when he wasn't - a lot of his "therapy" described in the book seemed to me to be very dubious or abusive even. *shrugs* (Which isn't to argue the matter of innate gender or whatnot, just that I think that in that specific case which is the one people always bring up when talking about gender anything (have you noticed?), there's a lot more stuff going on.)