What is the Mayan calendar gender predictor?

Casey Randall Alphabiolabs

By Casey Randall, Head of Genetics at AlphaBiolabs
Last reviewed: 05/07/2024

The Mayan calendar gender predictor is a fun way to guess the gender of an unborn baby that uses the mother’s age and the month of conception to predict what the baby’s gender will be.

Here, we explain how this method works and how accurate it is, as well as other methods that can be used to determine a baby’s gender.

What is the Mayan calendar gender predictor?

The Mayan calendar gender predictor is a method that is sometimes used to predict whether an unborn baby is likely to be a boy or girl.

If the mother’s age and month of conception are both odd numbers or both even numbers, the baby is predicted to be a girl.

If one number is even and the other is odd, the baby is predicted to be a boy.

For example, if a 30-year-old mother conceives a baby in May, the baby would be predicted to be a boy as 30 is an even number and May is month number 5, an odd number!

The Mayan calendar gender predictor is quick and easy to use, and a fun way to guess a baby’s gender. However, there is no scientific proof that this method works when it comes to accurately predicting a baby’s sex before birth.

Mayan calendar gender predictor

Age of mother at conception Month of conception Baby gender prediction
Even Even Girl
Odd Odd Girl
Even Odd Boy
Odd Even Boy

How accurate is the Mayan calendar gender predictor?

There is no scientific merit to prove that the Mayan calendar gender predictor is accurate.

The predictor is not a scientific tool and can only be used as a fun way to guess the gender of an unborn baby.

As you will either be having a baby boy or a baby girl, any method used to predict the baby’s gender (that doesn’t use a scientific technique) will only be accurate around 50% of the time. Essentially, it is like flipping a coin!

Order an At-home Baby Gender Test

Should I use the Mayan calendar gender predictor?

The Mayan calendar gender predictor is a fun way to guess the gender of your baby, but the results should not be relied upon.

As the dates used for this method are based on the mother’s age and the month of conception, the test can be carried out at any point during the pregnancy and the results will stay the same – though they may not be correct.

How can I find out my baby’s gender for certain? 

To accurately determine the gender of an unborn baby, the best option is to carry out a baby gender blood test, such as the test we offer at AlphaBiolabs.

Baby gender blood testing can be carried out from as little as 6 weeks into a pregnancy and has an accuracy of over 99%.

Our At-home Baby Gender Test kit contains everything you need to collect a small blood sample quickly, easily, and painlessly from the mother, and then return it to our accredited UK lab for testing.

We are the ONLY UK laboratory to offer the TinyTAP device for blood sample collection, allowing you to collect your blood sample in the comfort of your own home, with no venous blood draw or clinical appointments needed.

If you would prefer to have your sample collected by one of our professional sample collectors, you have the option to order a Clinical Baby Gender Test.

Laboratory analysis is performed in the same way as with our At-home Baby Gender Test and your results will be just as accurate (99.9%). However, with a Clinical Baby Gender Test, you can choose to have your sample collected at one of our walk-in centres* or a time and location convenient to you* (via TinyTAP or venous blood draw).

Both our At-home Baby Gender Test and Clinical Baby Gender Test offer results in just 3 working days** or the next-day** if you upgrade to our Express Service.*

Other methods of determining your baby’s gender are available. However, none of these offer results from as early as 6 weeks into pregnancy, or the ability to collect your own blood sample at home. Additionally, some of these methods (e.g. chorionic villus sampling and amniocentesis) carry a small risk of miscarriage and are only available to women who are at high risk of having a baby with a genetic or chromosomal abnormality.

Learn more: When and how can you find out the gender of your baby?

*Additional fees apply. **From receipt of samples into our laboratory.

Where can I get a baby gender test? 

The best way to accurately determine the sex of your baby before birth is to take a DNA test.

If you want to find out the sex of your baby as soon as possible, without having to make a clinical appointment, our At-home Baby Gender Test is the test for you.

Collect your own blood sample in the comfort of your own home using our innovative, pain-free TinyTAP device, and return your sample to our laboratory. Your secure results will be emailed to you in just 3 working days, or the next day if you upgrade to our Express Service.

We are the only UK laboratory to offer the easy-to-use, fuss-free TinyTAP device for baby gender testing!

Alternatively, you can choose to have your blood sample collected by one of our professional sample collectors* at one of our nationwide walk-in centres or at a time and location convenient to you (via TinyTAP or venous blood draw).

Order your Baby Gender Test online now, call 0333 600 1300 or email info@alphabiolabs.com.

*Additional fees apply

Baby Gender Testing

Boy or Girl? Find out for just £89 with results in 3 days

Casey Randall, AlphaBiolabs

Casey Randall

Head of Genetics at AlphaBiolabs

Casey joined the AlphaBiolabs team in 2012 and heads up both the DNA and Health testing teams.

An expert in DNA analysis and a member of the International Society for Forensic Genetics (ISFG), Casey holds an MSc with Distinction in DNA Profiling and a First-Class BSc with Honours in Forensic Science.

Casey is responsible for maintaining the highest quality testing standards, as well as looking for ways to further enhance the service that AlphaBiolabs provides and exploring new and innovative techniques in DNA analysis.

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