One of the ways the Chinese predict the gender of a baby is to use a lunar-based calendar that uses the mother's age at conception along with the month of conception to make a prediction. This method is supposedly based on ancient Chinese techniques.
People who believe in the efficacy of the Chinese gender chart claim it has been in use for over 700 years and has an accuracy rate of over 90 percent. According to legend, the chart was formed using the I Ching, which is an ancient Chinese religious divination tool. Ages are calculated based on lunar cycles, so the mother's lunar age may not be the same as her legal age.
Some traditional superstitions also claim that the mother can affect the gender of the baby by altering her diet in the week before conception. According to this superstition, eating carrots, lettuce, mushrooms and tofu help women conceive boys. Eating pickles, meat and fish help women conceive girls.
Chinese superstitions, like many in the world, propose that the mother determines the baby's gender. However, in reality, the chromosomes provided by the sperm determines gender. Many modern Chinese people with access to health care use ultrasounds to predict a baby's gender before it is born, just like people in other countries.