🥚 Ovulation tracked 2m ago ·🌱 Fertile window mapped 4m ago ·🔒 100% private ·🌍 Used in 47 countries ·🧠 AI-powered ·👶 Helping women conceive ·🥚 Ovulation tracked 2m ago ·🌱 Fertile window mapped 4m ago ·🔒 100% private ·🌍 Used in 47 countries ·🧠 AI-powered ·👶 Helping women conceive ·
Fertility Calculator · Free · 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
⭐ RecomendadoOr enter dates manually
28d
🦋
Chatear con Cyra
Comparte tus fechas recientes de menstruación
💜 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 — nothing is uploaded.
Tus datos están seguros · Se quedan en tu navegador · Sin app necesaria
3 SEGUNDOS
How It Works
📅
01Enter Your Dates
Last period date and cycle length — or just tell Cyra
🥚
02AI Finds Ovulation
Calculates your exact ovulation day and fertile window
📊
03Get Your Calendar
Color-coded fertility calendar personalized to YOU
Preguntas frecuentes
Más Herramientas Gratis
⚕️ Esta calculadora proporciona estimaciones basadas en matemáticas de ciclo promedio. No sustituye el consejo médico.