Did it work for you? You are supposed to put 1 tsp of baking soda in one disposable cup and pee in another--then pour the urine into the cup with baking soda. If it doesn't fizzle it's a girl and if it does it's a boy. We had an early gender scan at 15 weeks clearly showing a boy, but my pee test said girl. I'm sure it's just one of those old wives things!