Baby Gender
Predictor

Scientific studies suggest the Chinese Gender Chart is accurate roughly 50% of the time — about the same as a coin flip. A Canadian study (Journal of Obstetrics and Gynaecology Canada, 2010) tested the chart on a large sample and found no statistically significant predictive accuracy. It's a fun tradition, not a medical test.

Your Chinese lunar age = your Western (Gregorian) age at the time of conception + 1. This is because in Chinese tradition, a baby is considered 1 year old at birth. If you were born in January or February, you may need to add an additional year depending on when Chinese New Year falls. Our calculator handles this automatically.

Yes — use the IVF tab in our predictor. For IVF, you should use your egg retrieval date as your conception date, not your transfer date. If you had a Day 5 (blastocyst) transfer, your retrieval date = transfer date minus 5 days. If Day 3 transfer, retrieval = transfer date minus 3 days.

The Chinese Gender Chart (also called the Chinese Gender Calendar or Chinese Birth Chart) is a traditional Chinese method for predicting a baby's sex. It was allegedly discovered in a royal tomb near Beijing and is said to be over 700 years old. The chart cross-references the mother's Chinese lunar age at conception with the Chinese lunar month of conception.

The Chinese lunar calendar is based on moon cycles, while the Gregorian calendar is solar. The Chinese lunar year starts on Chinese New Year (between January 21 and February 20 each year). A Chinese lunar month typically starts 1–7 weeks offset from the Gregorian month. Our calculator converts your dates automatically.

LMP stands for Last Menstrual Period — the first day of your last period before pregnancy. If you don't know your exact conception date, we can estimate it as LMP + 14 days (standard medical calculation for a 28-day cycle). This is less precise than knowing your actual conception date.

The traditional Chinese Gender Chart only covers lunar ages 18–45. If you are younger than 18 or older than 45 at conception, the traditional chart does not provide a prediction.

No — the chart was designed for single pregnancies. For twins, the chart would theoretically predict one gender (the gender associated with your lunar age and conception month), but whether this applies to both twins, or just the first, is not addressed by the traditional method.