Conception Calculator

Estimate your fertile window, ovulation date, and due date based on your menstrual cycle

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Calculate Your Fertile Window

Select the first day of your last menstrual period

💡 The Fertile Window: The 3-day window during which the probability of conception is highest. Sexual intercourse during this period results in pregnancy in approximately 30% of cases.
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Fertile Window
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Best 3 days for conception (30% success rate)
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Ovulation Day
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Peak fertility - highest chance of conception
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Estimated Due Date
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If conception occurs during fertile window
Your Cycle Calendar
Period
Fertile Window
Best Days
Ovulation
Understanding Your Fertility
The Fertile Window Explained Sperm can survive in a woman's body for up to 5-7 days. The fertile window is the 3-day period before ovulation through the day of ovulation. Sexual intercourse during this time has the highest probability of resulting in pregnancy (approximately 30%).
🎯 Regular Intimacy: Have sex 2-3 times per week, even outside your fertile window. Regular lovemaking prepares the body for childbearing and raises hormonal levels.
🌡️ Track Basal Body Temperature: Your temperature rises by 0.5-1°F after ovulation. Take it first thing in the morning before getting out of bed using a basal thermometer.
💧 Monitor Cervical Mucus: Before ovulation, mucus becomes clear and slippery like raw egg white. This is your most fertile time.
📅 Track Your Cycle: Keep a record for 2-3 months to identify your personal pattern. Ovulation typically occurs 14 days before your next period.
😌 Reduce Stress: If tracking becomes stressful, simply have sex every 2 days. This ensures you'll hit a fertile day without the pressure of charting.
❤️ Focus on Connection: Feeling good and loving is an essential part of the process. Don't let baby-making become a chore - keep the romance alive!