Ovulation Calculator
The Ovulation Calculator estimates the most probable ovulation/fertile window as well as other related dates. The estimations are based on a woman’s last period date. This calculator should not be used as a form of birth control.
22 days to 44 days
Important dates for this cycle:
Important dates for the next 6 cycles:
| Period Start | Ovulation Window | Due Date |
|---|
Note: This calculator provides estimates only. Individual cycles may vary. Consult with a healthcare provider for family planning or conception advice.
Ovulation & Fertility Window
Ovulation occurs when an ovary releases a mature egg, typically 14 days before your next period. The most fertile days are usually 5 days before ovulation through the day of ovulation itself, since sperm can survive up to 5 days while the egg remains viable for 12-24 hours after release.
Tracking Methods
- Cycle Tracking: For regular cycles (28 days), days 10-18 are typically fertile. Track your period start dates to identify patterns.
- Basal Body Temperature: Your morning temperature rises slightly (0.5°F) after ovulation.
- Ovulation Kits: Detect hormone surges (LH) 24-48 hours before ovulation with 99% accuracy. Saliva/sweat tests can predict even earlier.
Key Facts
- Implantation occurs 6-12 days after fertilization
- Irregular cycles may require combined tracking methods
- Stress, illness, or lifestyle factors can shift ovulation timing
This version maintains all key information while being more scannable and organised. Let me know if you'd like any adjustments!