Ovulation Calculator
Identify your peak fertility window.
Cycle Tracking
28 days
Enter your cycle data to see your fertile window.
Understanding Ovulation
Ovulation is the process where a mature egg is released from the ovary.
The Fertile Window
The "fertile window" refers to the days in a woman's menstrual cycle when pregnancy is possible.
How to Use
- Select the first day of your last period using the date picker.
- Adjust the slider to indicate your average cycle length.
- Click "Estimate Fertility" to see your estimated ovulation date and peak fertile window.
Frequently Asked Questions
What is the "fertile window"?
The fertile window includes the day of ovulation and the five days leading up to it. This is the time during a woman's cycle when pregnancy is most likely to occur.
How does cycle length affect ovulation?
Ovulation generally occurs about 14 days before the start of the next menstrual period. In a 28-day cycle, this is day 14. In a 32-day cycle, it would be around day 18.