Have you seen the over the counter test that predicts of the baby?

My mom saw a commercial for this and is dying to buy it. She is nuts! She has 5 grandsons and only one granddaughter and is dying for me to have a girl. Supposedly, you just pee on the stick and it says boy or girl LOL. Completely ridiculous if you ask me. I wouldn't believe it anyway. What do you guys think of this product?