Suppose you recently discovered that you’re pregnant and are open to learning what the gender of your unborn baby could be. In that case, you may have heard of gender predictor tests such as the Ramzi theory. Some people want to know the sex of their baby so they can plan for when it’s birth, choose a name or bond with them more inside the womb. Others may have medical reasons for wanting to learn the gender, primarily if genetic disorders exist in the family.

Many myths and old wives’ tales offer an alternative way to determine the gender of a baby, albeit without much scientific backing. 

RelatedOld Wives Tales: Gender Prediction

Is the Ramzi theory a reliable way to determine the gender of your baby as early as in the first trimester, or is it just a myth? 

We will explain this theory in detail, including its reliability and what experts say.

What is the Ramzi Theory?

The Ramzi theory, developed by Saad Ramzi-Ismail, suggests that the location and size of the placenta at a six-week ultrasound can determine a baby’s biological gender. 

The Ramzi theory is a method to predict the gender of a child by looking at the location of the placenta on an ultrasound image. According to the theory, a placenta on the right side indicates a boy. 

In contrast, one on the left suggests a baby girl is on the way. Unfortunately, no scientific evidence supports the Ramzi theory, and whilst accuracy rates are high from our customers, results should still be taken with a pinch of salt.

The Ramzi theory was first used in the early 2000s when Ramzi claimed that he had found the correlations between scans by analyzing thousands of prenatal ultrasounds. According to his findings, the theory “predicts the fetal gender” 97% of the time.

One reservation held within the scientific community is that Ramzi has never published his data, and no other researchers have reproduced his findings to date.

ultrasound using baby heart rate to predict gender

What to Expect During Pregnancy Ultrasounds

Experts warn that although the Ramzi theory may sound promising and an exciting way to determine the sex of your baby, it is not a reliable method to predict this information or base decisions solely.

A 2010 study attempted to replicate Ramzi’s research by tracking the fetal gender in 277 pregnancies. They did not find any relationship between the location of the fetal placenta and the baby’s gender. They noted that it varied regardless of the baby’s gender.

Researchers found a correlation between the early assessment of a baby’s genitals and their biological sex. They were 95% accurate at predicting a baby’s sex using ultrasound to observe their genitals in the first trimester.

Certain obstetricians believe the embryo will stick where it has the highest chance of survival, and it has nothing to do with the chromosomal gender of the fetus.

lady lying down looking up at an ultrasound machine whilst she has her babys gender determined

How to Know your baby’s gender with reliability

There are several options available if you would like to discover the chromosomal gender of your baby prior to birth. It is best to discuss your options with your OB/GYN to find out which is the most suitable one for you. However, there are a few methods that you can use to get some insight into your baby’s chromosomal sex.

PGT-A Testing

PGT-A, or preimplantation genetic screening for aneuploidies, is a genetic screening that is performed on IVF embryos to check for chromosomal anomalies. PGT-A (preimplantation genetic screening, or PGS) is used to screen for extra or absent chromosomes in embryos.

In this test, between 2 and 10 cells are taken out of the embryo to see if it is chromosomally normal, along with discovering if it’s a baby boy or girl. This test is considered to be 99% accurate.

Non-invasive Prenatal Testing

Non-invasive prenatal tests are blood tests that help determine the likelihood that a child will be born healthy and without genetic abnormalities. This test analyzes DNA fragments circulating within a pregnant woman’s blood.

Screening DNA allows obstetricians to determine the chromosomal makeup of the fetus before they are born. This is also a way to determine the chromosomal gender of the fetus with high levels of accuracy.

This DNA circulating during pregnancy can be tested as early as nine weeks to determine a baby’s gender.

It is considered one of the most reliable ways to predict sex with roughly 95% accuracy.


An ultrasound is typically done halfway through pregnancy to check for fetal abnormalities. During this time, it is also possible to determine the gender of your baby if they are in such a position that their genitals can be seen and have also formed.

The younger the fetus, the more difficult it is to determine the gender. A study found that male fetuses less than 13 weeks old were correctly predicted 69% of the time. In contrast, female fetuses were accurately predicted at 86%.

If you’re still interested in trying our gender predictor tests, then please choose your preferred theory below:


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