Chinese Gender Chart
A traditional novelty predictor based on the mother's lunar age at conception. About 50% accurate, just for fun.
How the chart works
The traditional chart is organized by the mother's lunar age at conception and the lunar month of conception. Lunar age adds roughly one year to your Western age, because Chinese tradition counts the year in the womb as age one.
Legend says it was found in a royal tomb over 700 years ago. Studies that checked it against real birth outcomes put its accuracy at about 50%, i.e. no better than a coin flip. It's a fun tool, not a diagnostic.
Want a real answer?
An ultrasound after 18 weeks, or non-invasive prenatal testing (NIPT) from 10 weeks, can tell you the actual sex of your baby.