Is it possible to calculate the sex of a child based on ovulation?

There is a theory (Shettles method) that conceiving on the day of ovulation increases the chances of a boy, and 2-3 days before - a girl. However, this method does not provide a 100% scientific guarantee.

How does the calculator work with an irregular cycle?

For irregular cycles, the calculator gives only a rough forecast. For accuracy, it is recommended to combine calculations with ovulation tests.

Can I use the calculator for contraception?

The calendar method is not a reliable method of contraception (Pearl index is high). We recommend using barrier methods of contraception on dangerous days.

Ovulation calculator

Calculation of fertile days and forecast of current status

First day of last period

Cycle (days)

Duration

Enter your cycle parameters
to see the forecast

Expected ovulation:

—

Probability of conception today: —

Fertile window -

Next periods -

Current day of the cycle -

💡 The calculation is based on the calendar method. For maximum accuracy, use special ovulation tests.

Ovulation and fertile days calculator

📅 Pregnancy planning and cycle calculation

This tool helps determine the “fertile window” - the days when the likelihood of getting pregnant is maximum. The calculation is based on the calendar method and is suitable for women with a stable cycle.

⚠️ Important: The calendar method gives a forecast based on statistics. Accuracy is affected by stress, climate change or hormonal imbalances. For reliable contraception, use additional means of protection.

How to read calculation results?

After entering the date of your last menstruation, the calculator will display a graph. Here's what this data means:

🌷 Ovulation day:The egg is released from the ovary. This is peak fertility (usually 14 days before the end of the cycle).
💜 Fertile window:5 days before ovulation and 1 day after. Sperm can live in the body for up to 5 days, “waiting” for the egg. Sex these days is highly likely to lead to conception.
🩸 Next menstruation:Forecast of the start of a new cycle.

💡 If your attempts are successful, be sure to save the start date of your last menstruation - you will need it to use our pregnancy calculator and find out the exact date of birth.

Frequently asked questions (FAQ)

🔹 Is it possible to calculate the gender of a child (boy/girl)?

There is a theory that sperm carrying the Y chromosome (boy) are faster, but live shorter, and X (girl) are slow, but tenacious. Accordingly, to conceive a boy, PA must be exactly on the day of ovulation, and for a girl - 2-3 days before it. However, this method does not scientifically guarantee results.

🔹 What to do if the cycle is irregular?

If the cycle varies (for example, from 25 to 35 days), the calculator will only show an approximate range. In this case, it is more reliable to use pharmacy ovulation tests or measure basal temperature.

🔹 Is it possible to get pregnant immediately after your period?

Yes, this is possible, especially if you have a short cycle (less than 24 days). Ovulation may occur early, and sperm will have time to “survive” until the egg is released.