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How accurate is a baby gender prediction calculator?

It’s for fun only. Calculators based on the Chinese gender calendar, Mayan parity, LMP/cycle data, or heartbeat myths are not medical tests. For reliable results, use NIPT (~10 weeks) or the anatomy ultrasound (~18–22 weeks).

What is the Chinese gender calendar and how is it used?

The Chinese gender calendar is a **folklore method** that maps the mother’s age at conception and the conception month to a predicted sex. Our tool includes a simplified version for entertainment, not diagnostic purposes.

Does fetal heart rate predict if it’s a boy or a girl?

No credible scientific evidence supports the **heartbeat myth**. While popular, fetal heart rate varies for many reasons and is not a reliable gender predictor. It’s included here purely as a playful input.

Can conception date or cycle length indicate my baby’s sex?

Timing (conception/ovulation) is often mentioned online, but robust evidence is lacking. LMP and cycle length help estimate dates—not gender. Treat any timing-based predictions as **entertainment**.

When can I know my baby’s sex for sure?

**NIPT** can identify sex chromosomes from around **10 weeks**. The **anatomy ultrasound** at **18–22 weeks** usually confirms sex visually. Invasive tests (CVS/Amnio) can determine sex but are done for medical reasons.

Do parents’ ages, cravings, or the moon phase affect gender?

No. Claims linking **parent age**, **food cravings**, or **moon phases** to gender are myths. Genetics determine sex. These factors do not change the odds.

Is my data stored when I use the gender predictor?

No. Inputs like LMP, due date, or heartbeat are processed to show results and are not saved as personal data. This is a **session-only**, for-fun calculator.