Ovulation Calculator

Ovulation Calculator

Know when it's time to try. To increase your chances of conception, determine your most fertile days.

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Date of your last period:

Based on your information, your most fertile days for the next several months — and their corresponding due dates — are provided below:

Fertile Days:
Resulting Due Dates:

We can email you!

If you want e.p.t® to send you a reminder email the day before you start ovulating, enter your email address below.

Your Email:

Additional Email: e.g., Spouse's Email
Human fertility is very complex and some individuals may find that subjective variations could affect the calculation. Please consult your personal physician to resolve any questions.