This too, from China?

The Chinese Gender Chart, believed to have been buried in a royal tomb for over 700 years and recently rediscovered, claims to predict the gender of an unborn child based on the mother's age and month of conception, with a 60-80% rate of success. Simply find the age of the mother at the time of conception on the chart below and then follow across to the month the baby was conceived to find the predicted gender.

(I would suggest that you use this information along with modern suggestions to improve the chances of having a boy or girl as wished by you)

Here is the chart:http://www.choose-sex-of-baby.com/ChineseGenderCalendar.html