How does the Chinese Gender Chart Work? For the two, the difference is that we have converted your conception date into Chinese date format and calculate your Chinese age at the time of conception automatically if you use the Chinese Gender Prediction Calculator tool. Even if Eastern medicine and philosophies are completely foreign to you, the easy-to-use Chinese Gender Chart just might give a nod to whether you should start stocking up on pink or blue. Was it right for past pregnancies? Just click the link to select your date of birth, preferred baby gender and the year to get pregnant, you will get the best conceiving time quickly. However, there is no scientific basis to the Chinese birth chart. How does it compare to the Chinese Gender Chart? If one number is odd and the other number is even, they predict a baby BOY. To see its accuracy, you can test if it's accurate to your relatives or friends who already have kids. If the mother was 23 at the time of conception, and her conception month was April, she would be carrying a boy, according to the Mayans. But there is one option some mamas believe carries more weight than other old wives tales: July 31, Mayan Gender Prediction Have you heard of this gender prediction method? When it comes to guessing baby gender, supposedly so. More Ways to Predict Baby's Gender. At that time, it was kept by the royal eunichs and used by the royal families only. Take the age of the mother at the time of conception and the number representing the conception month If both numbers are even, OR if both numbers are odd, the Mayans predict a baby GIRL. The Chinese gender chart is based on factors including the Chinese lunar calendar, five elements, yin and yang, the eight diagrams, etc.