π₯ Ovulation tracked 2m ago Β·π± Fertile window mapped 4m ago Β·π 100% private Β·π Used in 47 countries Β·π§ AI-powered Β·πΆ Helping women conceive Β·π₯ Ovulation tracked 2m ago Β·π± Fertile window mapped 4m ago Β·π 100% private Β·π Used in 47 countries Β·π§ AI-powered Β·πΆ Helping women conceive Β·
Fertility Calculator Β· Free Β· No App Required
When Am I Most Fertile?
π± Your body has a rhythm. Let's find your most fertile days and the best time to try.
Upload your calendar or records
Photo gives AI 95%+ accuracy
β RecommendedOr enter dates manually
28d
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Chat with Cyra
Share your recent period dates
π Hi! I'm Cyra. To find your exact ovulation day I need your last 3β6 period start dates. The more you share, the smarter I get! Your data stays in your browser β nothing is uploaded.
Your data is safe Β· Stays in your browser Β· No app required
3 seconds
How It Works
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01Enter Your Dates
Last period date and cycle length β or just tell Cyra
π₯
02AI Finds Ovulation
Calculates your exact ovulation day and fertile window
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03Get Your Calendar
Color-coded fertility calendar personalized to YOU
Frequently asked questions
More Free Tools
This calculator provides estimates based on average cycle mathematics. It is not a substitute for medical advice. For personalized predictions, use the Cyra app which learns from YOUR cycle data.