Calculate safe and fertile days in your menstrual cycle
Enter your information above and click “Calculate Safe Days” to see your results
Your Safe & Fertile Days
Safe Days
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Fertile Window
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Ovulation Day
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Next Period
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Safe Days
Lowest chance of pregnancy
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Fertile Days
High chance of pregnancy
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Ovulation Day
Highest chance of pregnancy
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Your Cycle Calendar
Understanding Your Cycle
- Safe Days: Days when pregnancy is least likely to occur (before ovulation and after fertile window)
- Fertile Window: 5-6 days before ovulation + ovulation day (highest chance of pregnancy)
- Ovulation Day: The day when an egg is released from the ovary (most fertile day)
- Menstruation: Period days (generally safe but avoid intercourse if preventing pregnancy)
Safe Days FAQ
Your complete guide to understanding and calculating safe days
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What are safe days in a menstrual cycle?
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Safe days are when pregnancy is least likely – before ovulation starts and after it ends. |
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How to calculate safe days?
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Track cycles for 6 months, find shortest/longest cycles, avoid days (shortest-18) to (longest-11). |
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How to calculate safe days to avoid pregnancy?
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Avoid days 8-21 in 28-day cycle. Use protection during fertile window for best results. |
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How to calculate safe days for sex?
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Safe: Days 1-7 & 20-28. Fertile: Days 8-19. Consider cycle irregularities. |
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How do I calculate my safe days?
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1. Track last 6 periods 2. Note cycle lengths 3. Find shortest & longest 4. Avoid fertile window. |
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How do you calculate safe days?
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Same as above – track cycles, calculate fertile window, days outside are safe. |
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How to calculate my safe days?
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Personal calculation requires tracking your own cycle patterns for accuracy. |
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How to calculate your safe days?
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Individual calculation based on personal cycle history and regularity. |
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How to calculate safe days after periods?
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Days 1-7 relatively safe. Days 8+ increasing risk. Safest: Wait 3 days after ovulation. |
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How to calculate safe days in menstrual cycle?
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Identify ovulation day (approx day 14), avoid 5 days before and 1 day after. |
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How to calculate safe period days?
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Period days are safe for pregnancy but not recommended for intercourse. |
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How to count safe days after periods?
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Count from period day 1: 1-7 safer, 8-19 fertile, 20-28 safer again. |
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Are safe days effective to avoid pregnancy?
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76-95% effective with perfect use. Less reliable than modern contraception. |
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What are safe days for unprotected intercourse?
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Menstruation days, first week after period, last week before next period. |
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How does the calendar (rhythm) method calculate safe days?
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Tracks cycle history: avoid days (shortest-18) to (longest-11). For 28-day: avoid days 10-17. |
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