May 2026
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Period
Fertile
Ovulation
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📊 Your Cycle Stats
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🔮 Next Cycle Predictions
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Want your full fertile window? Once you've logged 3+ periods your average cycle length is calculated automatically — use it in our free ovulation calculator for your most accurate fertile window prediction.
🌿 Trying to conceive? The HSE recommends starting folic acid at least 3 months before conception. Available from Lir Pharmacy with Irish nationwide delivery.
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Your privacy is protected. All cycle data is stored exclusively on your device using your browser's localStorage. It is never uploaded to any server, never shared with third parties, and is completely invisible to OvulationCalculator.ie. Clearing your browser data will also clear your cycle history.
Medical Disclaimer: This cycle tracker is for personal tracking purposes only and does not constitute medical advice. Predictions are estimates based on your logged data. Always consult your GP if you have concerns about your cycle or fertility. For general cycle guidance see hse.ie.