Gender Prediction Tools
Explore popular theories and ancient calendars to guess your baby's gender while you wait for the big reveal.
Nub Theory
Analyze the angle of the genital tubercle from your 12-week scan.
Ramzi Theory
Predict gender based on placenta placement in early scans (6-8 weeks).
Skull Theory
Compare male vs female skull shapes from your ultrasound.
Chinese Gender Calendar
Ancient lunar calendar prediction based on conception date.
Old Wives Tales
Fun quiz based on symptoms like cravings and morning sickness.
Mayan Calculator
Prediction based on parent age and conception year math.
Science vs. Folklore: What You Need to Know
Scientific Methods
The only 100% accurate ways to determine gender before birth are DNA tests (NIPT) or Invasive Diagnostic Tests (CVS/Amnio).
Ultrasounds (from 18-20 weeeks) are about 95-99% accurate, depending on the baby's position. Early theories like Nub Theory and Ramzi Theory claim accuracy rates between 50% to 90%, but medical consensus varies.
Fun & Folklore
Tools like the Chinese Gender Calendar, Mayan Calculator, and Old Wives' Tales rely on superstition, astrology, or anecdotal evidence.
While they are incredibly fun to play with, statistically, they have a 50% success rate (the same as a coin toss!). Enjoy them for the excitement, but don't paint the nursery based on them!
Want a more scientific peek?
While these theories are fun, our AI Portrait generator uses advanced technology to predict your baby's facial features from your ultrasound.
Try AI Portrait Generator