Chinese Gender Chart生 · 男 · 女
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Tradition · 中国生男生女表

About the Chinese gender chart

A short, honest look at where this chart comes from — and what it can (and can't) tell you.

Where it comes from

The Chinese gender chart is a folk tradition said to date back centuries. According to popular legend, an original version was discovered in a royal tomb near Beijing and later reproduced in almanacs across East Asia. It crosses the mother's lunar age at conception with the lunar month of conception to suggest the baby's sex.

How it works

The chart is simply a fixed table: pick the row matching the mother's lunar age (18–50) and the column matching the lunar conception month (1–12). The cell shows either Boy or Girl. There is no calculation, no biology, and no personal factor beyond those two inputs.

What science says

There is no scientific evidence that the chart predicts a baby's sex better than a coin toss. Peer-reviewed studies that compared the chart's predictions to real births found accuracy near 50% — the same as random chance. The sex of a baby is determined by which sperm fertilises the egg, not by the mother's age or conception month.

How to use it

Treat it as a fun tradition, like a horoscope. Share it at baby showers, compare it with friends, or save the result as a keepsake. Never use it as medical advice, never as a basis for any health or family-planning decision, and never as a reason for sex-selective choices.

Frequently asked questions

Quick answers to the most common questions about the chart.

Where did the Chinese gender chart come from?

Legend says the original chart was found in a royal tomb near Beijing roughly 700 years ago and later copied into almanacs across China. There is no verified historical record proving that origin, but the tradition has been passed down for generations and is still printed in many lunar calendars today.

How is the prediction calculated?

There is no calculation — the chart is a fixed lookup table. You take the mother's lunar age (her Western age plus about one year) and the lunar month of conception, then read the cell where the row and column meet. Each cell is pre-set to either Boy or Girl. The same inputs always return the same result for everyone.

Why isn't it scientifically proven?

A baby's sex is determined at conception by which sperm fertilises the egg — neither the mother's age nor the month of conception can change that. Studies comparing the chart's predictions to actual births found accuracy near 50%, the same as flipping a coin. That's why doctors and researchers consider it folklore, not a medical tool.