Ovulation & Fertility Calculator
Enter the first day of your last period and your average cycle length to estimate your ovulation date, fertile window, and next expected period.
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Enter your cycle information
days
Ovulation & Fertile Window
Ovulation is the release of a mature egg from the ovary, typically occurring about 14 days before the start of your next period. The fertile window spans approximately 5 days before and 1 day after ovulation, when the chance of conception is highest.
Signs of Ovulation
- Slight rise in basal body temperature (0.2-0.5 degrees)
- Changes in cervical mucus (clear, stretchy)
- Mild lower abdominal pain (mittelschmerz)
- Increased breast sensitivity