Chinese Gender Predictor

How old were you when you conceived?

When did you conceive?

Wondering whether you're having a boy or girl? Our Chinese gender predictor calculator forecasts your baby's sex based on an ancient Chinese gender chart and the Chinese lunar calendar.

There's no scientific evidence that the Chinese gender predictor works. But since there are only two choices – boy or girl – it has at least a 50-50 chance of making an accurate prediction!

What is the Chinese gender predictor chart?

Legend has it that the Chinese gender predictor chart (also known as a Chinese gender predictor calendar) is more than 700 years old and was discovered in a royal tomb near Beijing.

The technique involves converting the mother's age and the month of conception to dates on the Chinese lunar calendar, then cross-checking that data on a chart that predicts the baby's sex.

How accurate is the Chinese gender predictor chart?

Researchers at the University of Michigan School of Public Health did a study to test the Chinese lunar calendar method of predicting a baby's sex. They reviewed the records of 2.8 million Swedish births. Then they used a website-customized algorithm to estimate each mother's lunar age and month of conception.

When they checked the predictions of the Chinese baby calendar method against the sex of the children who were born, they concluded that the Chinese birth chart was correct about 50 percent of the time – no more accurate than flipping a coin!

How can I find out my baby’s sex for sure?

While a gender predictor is fun, there are several ways to find out your baby’s sex more scientifically.

  • NIPT: You can usually learn whether it’s a boy or girl starting at 10 weeks of pregnancy if you have noninvasive prenatal testing (NIPT), a blood test that can detect Down syndrome and a few other chromosomal conditions. (It takes a week or two to get the results.)
  • Anatomy Scan: Many pregnant women find out their baby's sex (if they choose to) during their mid-pregnancy ultrasound, which is typically done between around 18 and 22 weeks. But if the technician can't get a clear view of your baby's genitals, it may not be possible to tell for sure.
  • CVS or Amniocentesis: You can also get the news after having a more invasive genetic test like chorionic villus sampling (CVS) or amniocentesis. These tests are usually done to determine whether a baby has a genetic disorder or a chromosomal abnormality, such as Down syndrome. CVS tends to be conducted between 10 and 13 weeks of pregnancy, and amnio between weeks 15 and 20.
  • IVF: If you have in vitro fertilization (IVF), you may be able to find out the sex before you even transfer the embryo if there’s only one. If more than one embryo is transferred and they’re different sexes, you likely won’t be able to learn whether you’re having a boy or a girl until one (or more!) implant into the uterus. 
  • Home Gender Test: At-home baby gender kits test blood or urine to predict your baby's sex, but there's no scientific evidence that they really work.

What's the difference between gender and sex?

People often use the word “gender” when talking about their child's sex. However, the two are not the same.

A child is assigned a sex at birth based on biological characteristics, including genitalia. But their sex may not match the gender identity they assume later.


BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. We believe you should always know the source of the information you're seeing. Learn more about our editorial and medical review policies.

National Institutes of Health, National Library of Medicine, MedlinePlus, What Is NonInvasive Prenatal Testing and What Disorders Can It Screen For?Opens a new window, July 2021.

Centers for Disease Control and Prevention, Chorionic Villus Sampling and Amniocentesis: Recommendations for Prenatal CounselingOpens a new window.

Cleveland Clinic, AmniocentesisOpens a new window, April 2022.

University of Michigan, Chinese Lunar Calendar: Don't Paint the Nursery Just YetOpens a new window, May 2010.

Kate Marple
Kate Marple is a writer and editor who specializes in health, pregnancy, and parenting content. She's passionate about translating complicated medical information into helpful pregnancy and parenting advice that's easy to understand. She lives in San Francisco with her family.
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