For those moms who are pregnant and are chomping at the bit to know whether you’re having a boy or a girl, here’s a fun ancient Chinese Birth Calendar that determines the sex of the baby based on maternal age and the month of conception.

Supposedly, this chart can be used to predict the sex of your unborn child. It has been said to be 99% accurate. As the story goes, the chart was buried in a tomb near Beijing for 700 years and now can be viewed at the Institute of Science in Beijing. There’s a whole lot of Indiana Jones mojo in that story, regardless it is a fun predictor - just don’t expect to rush out and paint the nursery pink or blue based on the results!

(Via WebWomb.Com)