I interviewed someone once where they proceeded to tell me the special requirements regarding leave that they would need as they had children. They HAD to have the summer holidays, easter holidays, christmas off and also there could be times when the kids where sick when she could not come in!
As a woman in IT I know it's difficult to try and balance work and family demands .. but TELLING me that she had to have these special arrangements at the first interview was the reason she never got a call back, and her agent had an 'interesting' phone call from me afterwards... well that and she tried to keep showing me pictures of her kids during the interview and kept on telling me how bright they were!
The most interesting thing of all is that I have other staff with kids and they never asked for any extra consideration in these sorts of matters!