Fertility Window Calculator
Calculate your 6-day fertility window including peak ovulation days for the best chances of conception.
Fertility Window Calculator
Track your most fertile days
Understanding Your Fertile Window
Your fertile window is approximately 6 days: 5 days before ovulation plus ovulation day. The 2-3 days before ovulation are your most fertile.
Your Cycle Information
The day your last period started
Typical range: 21-35 days (average is 28)
Understanding Your Cycle Phases
Tips for Conception
Timing is Key
Have intercourse during your fertile window, especially 2 days before ovulation
Track Symptoms
Monitor cervical mucus, basal body temperature, and ovulation signs
Healthy Lifestyle
Maintain healthy weight, exercise moderately, and manage stress
Prenatal Vitamins
Start taking folic acid (400-800 mcg) daily before conception
Signs of Ovulation
Cervical Mucus
Clear, stretchy, egg-white consistency
Basal Body Temperature
Slight rise (0.5-1°F) after ovulation
Ovulation Pain
Mild cramping on one side (mittelschmerz)
Increased Sex Drive
Natural libido boost around ovulation
Fertility Facts
Sperm Lifespan:
Sperm can survive in the female reproductive tract for 3-5 days, which is why the fertile window extends before ovulation.
Egg Lifespan:
An egg survives for 12-24 hours after ovulation, making timing crucial for conception.
Irregular Cycles:
If your cycles vary by more than 7 days, consider tracking with ovulation predictor kits or consulting a healthcare provider.
Conception Rates:
Healthy couples have about a 20-25% chance of conceiving each cycle. Most couples conceive within 6-12 months of trying.
Medical Disclaimer
This calculator provides estimates based on typical cycle patterns. For personalized fertility advice, irregular cycles, or conception concerns, please consult your healthcare provider or fertility specialist.
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