I have never heard of this dealie, but at first, I was all about it for next time! .But after reidang a couple of the responses, I agree, I'd hate to get used to one gender, only to find out it was the other. With my daughter, I wasn't sick at all during pregnancy, and around 16 weeks, I sat up and bed and told my husband it was a girl. We keep my bizarre prediction to our selves, but sure enough, at the 20 week ultrasound, it was a girl!