Baby Gender Prediction Guide
Everything you need to know about reading your early ultrasound for a gender prediction — from the science behind nub theory to the community traditions of skull and Ramzi theory.
Nub Theory Gender Prediction — How Accurate Is It?
Learn how nub theory predicts your baby's gender from a 12-week ultrasound scan. Understand how it works, how accurate it is (70–90%), and how AI makes the analysis instant.
Read the nub theory guide →Skull Theory Gender Prediction — Does It Really Work?
Skull theory claims you can predict a baby's gender from skull shape at 12 weeks. Discover how it works, what the science actually says, and how Nubbly's AI combines skull shape with nub angle.
Read the skull theory guide →Ramzi Theory — Can Placenta Position Predict Baby Gender?
Ramzi theory claims placenta position at 6–8 weeks reveals your baby's gender. Learn how it works, what the science actually says, and how it compares to nub theory and NIPT.
Read the Ramzi theory guide →Ready to find out?
Upload your 12-week ultrasound and let Nubbly's AI apply nub theory instantly. Results in seconds — shareable with family and friends.
🌸Predict My Baby's Gender →One-time $9.99 · Results in seconds · Your scan stays private