Quoting Riley+3:" Boil purple cabbage for 10 minutes. 1/2 cup urine and 1/2 cup cabage water is what I saw online. If it turns purple, girl, pink boy."
Yup that's all you do. Chop up the cabbage, boil for 10 minutes, strain. Let the water cool. Mix equal part of urine and cabbage juice. The cabbage juice to start with with be a purpley colour. When you mix them if it turns a pink colour then boy, if it stays the same purple colour girl.
I've only done it with this pregnancy, and it was correct. I never tried it with my daughters so I have nothing to compare it with.
I looked for video's on youtube and the two I found were one for each gender and each were correct.