Baby gender by the Chinese chart

The ancient Chinese chart “predicts” a baby’s gender from the mother’s age and the month of conception. Enter them and the calculator shows the chart’s answer. Note: it’s a folk custom for fun, not a method of sex determination — it has no scientific accuracy.

See the chart’s “gender”

Enter the mother’s age at conception and the month of conception.

Choose an age and month — the “prediction” appears instantly.

How the Chinese chart works

Legend says the chart is centuries old and links the mother’s age at conception with the month of conception to give “boy” or “girl”. The calculator simply looks up the answer in this chart.

Several versions exist and differ in places — which itself shows there’s no real mechanism behind it.

Does it work? The honest answer

No. A baby’s sex is set by chromosomes (XX or XY) at fertilization and doesn’t depend on the mother’s age or the month of conception. Studies haven’t found the Chinese chart to be more accurate than chance — about 50/50, like a coin toss.

Treat the result as a fun game, not a prediction. Sex is reliably shown by ultrasound (usually from 18–20 weeks) or genetic tests.

How to actually find out the sex

Reliable methods: second-trimester ultrasound, non-invasive prenatal testing (NIPT) from maternal blood from 10 weeks, and invasive tests for medical indications. All with a doctor.

Folk signs (belly shape, sweet/salty cravings, fetal heart rate) don’t work either. Sex is just sex; the baby’s health matters far more.

Frequently asked questions

  • No better than a guess — about 50/50. Sex is set by chromosomes and doesn’t depend on the mother’s age or month of conception. It’s entertainment, not a method.

  • The chart maps the mother’s age at conception and the month of conception to “boy” or “girl”. The calculator looks it up — but there’s no scientific basis.

  • By second-trimester ultrasound (usually from 18–20 weeks) or non-invasive prenatal testing (NIPT) from maternal blood from 10 weeks. All with a doctor.

  • Sex is set at fertilization by which sperm chromosome (X or Y) fertilizes the egg. Neither age, diet nor month of conception affects it.

  • Because there is no “official” chart — various versions circulate. The discrepancies between them show it’s a custom, not a calculation.

Decode your pregnancy ultrasound

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This calculator is for entertainment and does not determine a baby’s sex. Sex is reliably shown by ultrasound or prenatal tests ordered by a doctor.