MyPregnancyCalculators.com

Calculate Fertile Window

Find the best time to get pregnant based on when you ovulate.

  • The Fertile Window is the time during your menstrual cycle when pregnancy is most likely to occur.
  • This time may include the 5 days before ovulation, the day of ovulation, and the day after ovulation.
  • An egg is viable for 12 to 24 hours after ovulation.
  • Sperm can live in the female reproductive tract for up to 5 days.

Average Length of Menstrual Cycle


Ovulation tests, combined with our calculator, can help you to detect your Fertile Window. Our recommended ovulation test: