Just remember this, there are no 100% accurate methods of determining the sex of your unborn child. It uses the Chinese lunar calendar and predicts what sex your baby will be by considering the age of the the mother at conception, and the month in which baby is conceived.
It was allegedly rediscovered on a Chinese tomb and is over 700 years old. If you can't wait for the result from a scan, then the Chinese Gender Predictor Calendar Chart is a fun way to predict the gender of your unborn child.
If you are expecting a baby, one of the most important questions that you may have is, what sex will my baby be? Will it be a boy or a girl?