Ovulation & Fertile Window Calculator

Pinpoint your most fertile days by calculating your estimated ovulation date and fertile window based on your menstrual cycle.

What is Ovulation?

Ovulation is the monthly process where a mature egg is released from an ovary. The egg then travels down the fallopian tube, where it can be fertilized. This period is the most fertile time in a woman's menstrual cycle. For most women, ovulation typically occurs about 14 days before the start of their next menstrual period.

Calculating Your Fertile Window

Your "fertile window" includes the day of ovulation and the five days leading up to it. Sperm can survive in the female reproductive tract for up to five days, so intercourse during this window provides the highest chance of conception.

Why It Matters

  • For Conception: It helps couples identify the optimal time to have intercourse to achieve pregnancy.
  • For Family Planning: It supports natural family planning methods by highlighting periods of peak fertility.

Limitations: This calculator provides an estimate. Individual cycle lengths can vary, and factors like stress or health changes can shift the timing of ovulation.

Find Your Fertile Days