Chinese Gender Calendar

Did this for fun today. For those of you who don't know about this:
An ancient Chinese secret: This chart can be used to predict the sex of your unborn child. It has been said to be 99% accurate. The chart was buried in a tomb near Beijing for 700 years and now can be viewed at the Institute of Science in Beijing. To predict what sex your baby will be, locate the age the mother will be when she gives birth and the month the child was conceived.

So, I did about 9 different ones on different sites and since the answers varied, I don't have a lot of confidence in them :)

Predictions were:
6 said BOY
3 said GIRL