πŸ₯š Ovulation tracked 2m ago ·🌱 Fertile window mapped 4m ago Β·πŸ”’ 100% private ·🌍 Used in 47 countries ·🧠 AI-powered Β·πŸ‘Ά Helping women conceive Β·πŸ₯š Ovulation tracked 2m ago ·🌱 Fertile window mapped 4m ago Β·πŸ”’ 100% private ·🌍 Used in 47 countries ·🧠 AI-powered Β·πŸ‘Ά Helping women conceive Β·
Fertility Calculator Β· Free Β· No App Required

When Am I Most Fertile?

🌱 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

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Or enter dates manually
28d
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Chat with Cyra

Share your recent period dates

πŸ’œ Hi! I'm Cyra. To find your exact ovulation day I need your last 3–6 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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01

Enter Your Dates

Last period date and cycle length β€” or just tell Cyra

πŸ₯š
02

AI Finds Ovulation

Calculates your exact ovulation day and fertile window

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03

Get Your Calendar

Color-coded fertility calendar personalized to YOU

Frequently asked questions

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.