Fertile Period Calculator
Use this fertile period calculator to estimate your ovulation day and the days when pregnancy is most likely. Enter the first day of your last period and your average cycle length to see your fertile window.
| Cycle length | Estimated ovulation | Fertile window |
|---|---|---|
| 28 days | Day 14 | Days 9-15 |
| 30 days | Day 16 | Days 11-17 |
| 32 days | Day 18 | Days 13-19 |
Note: This calculator provides an estimate only. Ovulation can vary from cycle to cycle, especially if your periods are irregular.
Disclaimer: This calculator is for educational purposes only and is not a substitute for medical advice.