Conception and Gender Calculator

The Conception and Gender Calculator estimates your ovulation date, fertile window, and potential baby gender using your last menstrual period and cycle length. This tool helps couples planning a family identify peak fertility days and predict their baby's sex. Whether you are actively trying to conceive, calculating a due date, or just having fun with gender folklore, this calculator offers valuable insights into your reproductive timeline.

The first day of your most recent menstrual period
Typical range is 21-35 days (28 days is average)
Age affects fertility and pregnancy outcomes
Optional, but can affect fertility

How Ovulation and Gender Prediction Is Calculated

To find your most fertile days, the calculator first determines your ovulation date by subtracting 14 days from your cycle length and adding that to your last period. This marks the moment an egg is released and is available for fertilization.

Ovulation Date = First Day of LMP + (Cycle Length - 14)

Where:

  • LMP = Last Menstrual Period
  • Cycle Length = Average days between periods

Next, it establishes a fertile window ranging from five days before to one day after ovulation. Gender predictions are generated using folklore methods, such as the Chinese Gender Chart, which compares the mother's age at conception to the lunar month, or the Shettles Method, which bases the prediction on intercourse timing relative to ovulation.

What Your Ovulation and Gender Prediction Means

Your results provide a timeline showing when you are most likely to conceive and an entertaining prediction of your baby's gender. The fertile window indicates the specific days when pregnancy is statistically possible.

Maximizing Conception: If your fertility rate is high, such as 20% or more for women under 30, aim to have intercourse every other day during your fertile window. Focus especially on the two days leading up to ovulation for the best chances.

Gender Planning: If you are using the Shettles method to conceive a boy, the results recommend timing intercourse as close to ovulation as possible. For a girl prediction, the method suggests having intercourse a few days before ovulation.

Important: Remember that irregular cycles can shift your ovulation date by several days, making exact timing harder to predict without tracking.

These calculations are estimates based on standard cycle averages and folklore theories. They are not a substitute for professional medical advice or diagnosis. Please consult a healthcare provider for specific fertility concerns or prenatal care.