Its easy. Just enter the data and find out when you ovulate.
What Is An Ovulation Calendar?
An ovulation calendar is used to track your menstruation and ovulation cycle. Once you’ve entered your menstruation information, you’ll be shown a calendar outlining your menstruation and your most fertile days. Using this information, you can effectively either target or avoid those days.
Why Do I Need An Ovulation Calendar?
Ovulation calendars are most often used by those interested in conceiving, but can also be very useful for those that would like to avoid pregnancy.