Ovulation Calculator
Predict your most fertile days and ovulation date based on menstrual cycle length to optimize conception chances.
Ovulation Calculator
Fertility & cycle tracker
Track Your Fertile Window
This calculator predicts your most fertile days based on your menstrual cycle. Ovulation typically occurs 14 days before your next period.
Your Cycle Information
When did your last period start?
Normal range: 21-35 days (average is 28)
How many days does your period typically last?
Signs of Ovulation
Cervical Mucus Changes
Clear, stretchy, egg-white consistency
Basal Body Temperature
Slight temperature rise (0.5-1°F) after ovulation
Increased Sex Drive
Natural libido boost during fertile window
Mild Cramping
Brief, one-sided pain (mittelschmerz)
Tips for Conception
Time It Right
Have intercourse every 1-2 days during fertile window
Track Your Cycle
Monitor for at least 3 months for accurate predictions
Healthy Lifestyle
Maintain healthy weight, reduce stress, avoid smoking
Check Ovulation Signs
Monitor cervical mucus and basal body temperature
Understanding Your Menstrual Cycle
1. Menstruation (Days 1-5):
Shedding of uterine lining. Hormone levels are low. This is Day 1 of your cycle.
2. Follicular Phase (Days 1-13):
Follicles develop in ovaries. Estrogen rises, preparing uterus for potential pregnancy.
3. Ovulation (Day 14):
Mature egg released from ovary. Peak fertility. Egg survives 12-24 hours.
4. Luteal Phase (Days 15-28):
Progesterone rises to prepare uterus. If no pregnancy, hormone levels drop and period begins.
Note: Cycle lengths vary between individuals. Track for 3+ cycles for better accuracy. Consult a healthcare provider if cycles are very irregular or if trying to conceive for over a year.
Important Note
This calculator provides estimates based on average cycles. For irregular cycles, fertility concerns, or family planning, consult with a healthcare provider. Not intended as birth control method.
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