Chinese Gender Chart prediction tool
The Chinese Gender Prediction Chart, also known as the Chinese Birth Chart or Chinese Lunar Calendar Gender Predictor, is an ancient tool said to predict the gender of an unborn baby based on the mother's lunar age at conception and the lunar month of conception. Legend says the chart was discovered in a royal tomb near Beijing over 700 years ago and was kept in the Institute of Science in Beijing.
The chart uses a grid system where the mother's lunar age (18-45) runs along one axis and the month of conception (1-12) along the other. Each intersection of age and month predicts either a boy or a girl. While many parents-to-be enjoy using the chart for fun, scientific studies have consistently shown its accuracy to be around 50% — equivalent to a coin flip.
In Chinese tradition, a baby is considered 1 year old at birth (not 0). Additionally, everyone ages one year at the Lunar New Year rather than on their birthday. To estimate your lunar age:
Simple method: Your current Western age + 1 (or +2 if you were born between January 1 and the Lunar New Year date of your birth year).
While the Chinese gender chart is a beloved cultural tradition and a fun way for expectant parents to guess their baby's gender, it has no scientific basis. A baby's biological sex is determined by chromosomes (XX for female, XY for male) at the moment of fertilization and has nothing to do with the mother's age or the month of conception. Modern methods like ultrasound (typically around 18-20 weeks) and NIPT blood tests (as early as 10 weeks) are the only reliable ways to determine fetal sex.
Throughout history, cultures have invented creative (and unscientific) ways to predict baby gender. Some popular myths include: carrying high means a girl, carrying low means a boy; morning sickness means a girl; craving sweets means a girl, craving salty means a boy; and the ring test (dangling a ring on a string over the belly). These are all fun traditions with no scientific validity.