The Chinese Lunar Calendar to determine baby's sex was taken from a 700 year old Royal Tomb near Peking, China. The original document is on display at China's Institute of Science.

Many people believe that this calendar is quite accurate, almost 93%.Weather you are a believer or not, the Chinese gender prediction chart can be fun to experiment with. So if you are pregnant, it can predict if you will have a boy or girl. And if you are planning to get pregnant, you can also refer this calender to know which month is the best time to conceive boy and girl.