Baby-Gender Predictor

Professional tool combining Qing-Gong table, parents' age, ovulation day and more scientific methods to predict your baby's gender. For entertainment only, not medical advice.

Predict Now How It Works

Smart Gender Prediction

Choose a method and fill in the information; the system will give you the most accurate prediction.

Used to calculate lunar age
Used for blood-type method
Lunar calendar month when conceived
Lunar year when conceived
How to use Qing-Gong table

The table predicts gender by mother's lunar age & lunar conception month. 300+ years old.

Lunar age: current year − birth year + 1 (after lunar new-year) or +2 (before).

Lunar age (real age + 1)
Lunar age (real age + 1)
Parents' age rule

If the sum of parents' lunar ages is odd → more likely boy; even → girl.

Formula: (father + mother) ÷ 2 parity check.

Predicted or known ovulation day
Timing relative to ovulation
Ovulation-day theory

Y-sperm swim fast but live short; X-sperm swim slowly but survive longer.

Rule: intercourse before ovulation → higher boy chance; after → higher girl chance.

Traditional lunar month
Traditional lunar age
Lunar-month theory

Yin-yang & five-elements theory claims different months affect gender.

Rhyme: "Odd-age odd-month → boy; even-age even-month → girl."

ABO system
ABO system
Blood-type theory

Statistics show certain combinations correlate with gender.

Data: A×O or B×O pairs slightly favour boys.

Actual or estimated conception
Optional blood Rh
Comprehensive Analysis

Combines all factors with weighted algorithm & machine-learning correction.

Accuracy: up to 80 %.

Helps estimate conception
Average menstrual cycle
Auto-convert to lunar

6 Methods in One Tool

Understand the science (or tradition) behind each method

Qing-Gong Table
Accuracy:
50 %
  • 300-year history
  • Easy lookup
  • No scientific proof
  • Same as coin flip
For tradition lovers
Parents' Age
Accuracy:
45 %
  • Simple math
  • No tools needed
  • No biology base
  • Low accuracy
Quick guess
Ovulation Day
Accuracy:
70 %
  • Biology backed
  • Y/X sperm facts
  • Needs exact ovulation
  • Many confounders
Science fans

FAQ

Our comprehensive model reaches ~80 % accuracy, but it is still for entertainment. B-ultrasound or genetic tests are the only reliable ways.

A 300-year-old chart from Qing-dynasty palace physicians using mother's lunar age and lunar conception month. No modern evidence, but fun cultural heritage.

Only indirectly. Foods may shift vaginal pH or mineral balance, giving one sperm type a slight edge. Effect is small (5-10 %) and never guaranteed.

Medical sex-selection (e.g. IVF-PGD) is allowed only for preventing sex-linked genetic diseases in most countries, not for family balancing.