Fertile Window
⭐ Ovulation Day
Today

💡 Timing Advice (Shettles Method)

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To favor a girl: Aim for 2-3 days before ovulation.

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To favor a boy: Aim as close to ovulation as possible.

Note: This is based on a popular theory and is not 100% scientifically guaranteed.

Track Your Ovulation and Fertile Window 🌸

Pinpoint your most fertile days and generate a custom, printable calendar to help you plan for a baby.

💡 How It Works

Maximize your chances of conceiving by understanding your cycle. Enter your last period and average cycle length to visualize your "Fertile Window"—the peak days for pregnancy. We provide a clear forecast for your current and upcoming cycles so you can plan ahead with confidence.

📘 Get the Most Out of This Tool

  • Enter your data: Simply input your last period's start date and your typical cycle length.
  • View a two-month forecast: See predictions for the next two months to coordinate your schedule.
  • Explore timing theories: Access quick tips based on the Shettles Method for those with a gender preference.
  • Print and save: Click "Print" to create a hard copy for your medical records or personal journal.

🧐 FAQ

How accurate are these predictions? These results are estimates based on cycle averages. Because stress, diet, and health can shift your dates, we recommend pairing this tool with ovulation test strips or basal body temperature (BBT) tracking for the highest precision.

What is the "Luteal Phase"? The luteal phase is the time between ovulation and the start of your next period. For most, this lasts about 14 days. If you aren't sure of yours, keep the default at 14.

Is the "Boy/Girl" advice guaranteed? No. The Shettles Method is a popular theory regarding the speed and durability of X and Y sperm, but it is not a scientifically proven guarantee.

📚 The Science of the Fertile Window

An egg lives for only 12 to 24 hours after release, but sperm can survive inside the body for up to five days. This is why your "Fertile Window" begins several days before you actually ovulate. To boost your odds, time intercourse in the days leading up to ovulation rather than waiting for the day itself.