Estimate your most fertile days and ovulation date.
Timing is everything when you are trying to conceive. Every month, there is only a small window of time—the fertile window—when pregnancy is possible. This window includes the day of ovulation and the few days leading up to it. Our Ovulation Calculator helps you identify these high-probability days by analyzing your cycle history, providing you with a personalized fertility calendar to help you on your journey toward parenthood.
Enter the date of your last period and average cycle length.
使い方
The tool uses your average cycle length to project your next expected period. It then counts back 14 days to find the estimated ovulation date and highlights the 5 days preceding it as your prime fertile window.
計算式
Next Period - 14 Days
Calculation Examples
1. **Standard Cycle**: With a 28-day cycle starting on the 1st, ovulation is estimated for the **15th**, with the fertile window starting on the **10th**.
Why use this tool in your daily life?
For couples trying to conceive, this tool is an essential planning partner. It removes the stress of uncertainty, allowing you to maximize your chances of pregnancy by focusing on the days when you are naturally most fertile.