Ramzi Theory: How to predict your baby's gender at just 6 weeks gestation

Ramzi Theory may mean you no longer have to wait 20 weeks to find out your baby's sex ...

Ramzi Theory illustrated by Two women proudly sho wing off a scan
(Image credit: Getty / Future)

The Ramzi Theory suggests that the gender of a foetus can be predicted as early as 6 weeks, so you might not have to wait 20 weeks to find out if you're having a boy or girl.

The theory can be over 97% accurate. However, there's a catch. Like the popular Nub Theory, you need a pregnancy ultrasound photo to try the Ramzi Theory. But this method only works if you have a scan before you are nine weeks pregnant. This is because it uses the placement of the placenta to help predict your baby's gender and if you're past nine weeks it is considered too late to use Ramzi's theory, as it is impossible to tell where the placenta originally implanted.

"The Ramzi Theory is a playful guess, a bit of fun," Amanda Bastianelli (opens in new tab), Specialist Midwife and sonographer tells us. "Its not looking at the baby itself - they look like little prawns - they’re about 15mm before 11 weeks, instead it focuses on which side of the image is the placenta forming."

The NHS (opens in new tab) rarely offer an ultrasound scan before 8-12 weeks pregnant, however some people choose to pay privately for a viability scan that can be done between 6 and 10 weeks to check whether a pregnancy is developing normally.

But, if you do get a scan photo early on, here's how to predict your baby's gender as early as 6 weeks gestation using the Ramzi Theory:

What is the Ramzi Theory?

Also known as Ramzi's method, the Ramzi Theory claims to be able to determine if your baby is a boy or girl by as early as six weeks, instead of the usual 20 weeks, using a 2D ultrasound picture to see which side the placenta is on.

Amanda explains; "If the placenta is on the right side, then you are believed to be having a boy. But if the placenta is on the left then there is a high likelihood that the child will be a girl."

How does the Ramzi Theory work?

The key is to look for a bright area around the sac, the large cavity of fluid surrounding the embryo, where the placenta is going to start growing. Ideally you need a medical professional who is familiar with the Ramzi theory to help interpret the scan results for you.

"In early pregnancy, so  before 11 weeks, there are changes that happen quickly - one of which is the development of the placenta. Up to 9 weeks there is no placenta. But our bodies will send out arteries and these will be embedding a pregnancy sac into the uterus, sending blood flow through, so on an ultrasound image a clinician will see a denser area." Amanda says.  

Woman looking at ultrasound results with doctor

Your doctor may be able to help by pointing out the placenta for you. (Credit: Getty)

According to the theory, if your placenta has implanted on the left side of your body, there is a 97.5% chance you are having a girl. If your placenta is on the right side of your body, there is a 97.2% chance you are having a boy.

However, not all scans are performed the same and the positioning of the placenta will depend on whether it is an abdominal or transvaginal scan. Images may be 'flipped' or 'mirrored' if it is an abdominal scan, meaning the left side is actually the right. But if it is a transvaginal scan then the placenta will appear on the 'same side'.

Amanda warns that even if you pay for a scan, many qualified clinicians wouldn't make a gender prediction based on this. "All medical professionals are regulated by the CQC (Care Quality Commission) and, whether you pay or not, all scans are for diagnostic reasons.  Health professionals are conscious as to the ethical side of things and there are occasionally people who might make a decision based on a gender."

She goes on to add; "For all registered professionals it would be against code of practice to make a guess in early pregnancy if it potentially meant ethical choices. Though they would happily share a print of your scan for you to have a playful guess at home."

When doesn't the Ramzi Theory work?

It can be much more difficult to determine the position of the placenta if you're carrying twins (opens in new tab) or multiple foetuses. In these cases, the results may not be accurate.

Also some experts are not convinced that the Ramzi theory is entirely accurate. "Many people tend to believe that you can guess based on which side the placenta is forming, but it really is just a 50/50 chance of an accurate prediction," Eliza Flynn from Biamother, says.

"In addition to this, each expectant mother carries their baby differently, and every baby develops at a different speed, therefore images may not be accurate. For example, the development of a baby at 8 weeks and 3 days, could actually be the same as another baby at 7 weeks, 6 days, so it is hard to make an accurate prediction. The main theory is dependent on which side your placenta is on; if the placenta is on your right, it is a girl, and if it is on the left, it’s a boy. "However, there is no scientific evidence to back this up and it is highly unlikely that this theory has any validity."

Ultrasound of twin pregnancy at approximately four weeks gestation.

In this ultrasound of a twin pregnancy at approximately four weeks gestation, it's difficult to determine the position of the placenta in the picture. (Credit: Getty)

But, you could still use other methods to try and work out if you're carrying a baby boy or a baby girl before your 20 week scan.

The Skull Theory (opens in new tab) can be tried once you have your 12 weeks scan, or if you develop a natural line on your stomach during your pregnancy (known as the Linea Nigra (opens in new tab)) then this is also apparently a good indicator if you might have a boy or girl.

If you don't have a scan photo in the early weeks of your pregnancy, you can still try and predict your baby's gender using astrology and the ancient Chinese Birth Chart, or there are also a ton of old wives' tales about pregnancy that can help you guess if you're carrying a boy or a girl.

Amanda adds: "Gender forms 16 weeks onwards - the nub will have gone in if it's a girl and out if it's a boy. On ultrasound - the sonographer would look for the ‘potty shot’ - so you can see genitals clearly. This option would be of gender prediction 99.9% accurate."

You might also like:

Baby gender prediction tests (opens in new tab)
Chinese birth chart (opens in new tab)
Nub theory (opens in new tab)
Boy or girl quiz (opens in new tab)

Video of the Week:

Woman smiling at camera
Amanda Bastianelli

Former NHS and Award-winning specialist midwife and sonographer, Amanda trained in Midwifery at University of Greenwich  and then went on to complete her PGC in Medical Imaging, Obstetrics & Gynaecology.

Stephanie Lowe
Stephanie Lowe

Stephanie Lowe is Family Editor at GoodTo covering all things parenting, pregnancy and more. She has over 13 years' experience as a digital journalist with a wealth of knowledge and experience when it comes to all things family and lifestyle. Stephanie lives in Kent with her husband and son, Ted. With his love of choo-choos, Hey Duggee and finger painting he keeps her on her toes.

With contributions from