Nub Theory with AI
- It is based on observing the ultrasound from the 11th week of pregnancy.
- During the first weeks, all babies have a small genital bulge called a “nub” (genital tubercle), which will later develop into a penis or clitoris.
- According to this theory, the inclination of the nub on ultrasound may indicate the baby's gender.
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The nub theory relies on analyzing the angle between your baby's spine and the Nub.
It's a boy! - if the Nub forms a 30-degree angle or more in relation to the spine.
It's a girl! – If the Nub is pointing straight out, forming an angle under 30 degrees in relation to the spine.

Nub with AI methodology
Nub's theory revolves around the position of the baby's genital tubercle, which forms in the baby's lower abdomen early in pregnancy. As it develops, the genital tubercle will develop into a clitoris in females or a penis in males.
The way this theory works is by taking a good look at how the baby bump, better known online as the “pendant angle” (ah, yes, you read that right!), is positioned to determine if it is a boy or a girl.
Depending on its relationship to the baby's spinal cord, you can determine which direction the baby will continue to develop, indicating which genitalia it will become.
This method is a great option for parents who missed the early window of Ramzi's theory but don't want to wait another month or two to find out the genre of their baby.
Artificial Intelligence can predict with almost 100% accuracy whether the baby is a boy or a girl by analyzing the angle between the spine and the knuckle.