I think it's a wives tale cause one of my friends on here was expecting a boy and her HCG levels were very high almost as high as mine and I'm having twins.....so I don't think you can go by that.
You know I have honestly never heard of this. My daughters were on the high side though so I would be interested to see what more people say.
i dont think that it has anything to do with it..just an old wives tale :)