This calendar is a guide to help you track your ovulation day. Most women have 28-32 day cycles and ovulation can take place during days 11-21 of the menstrual cycle. These days represent average cycles; many women have slightly shorter cycles and ovulate earlier and others have longer monthly cycles with ovulation occurring later in the month.

For best results enter in the dates of the first day of your last three menstrual periods. If you can not remember these three dates, then enter in the first day of your last menstrual period.

To calculate further, cliks the link below:-

http://www.webmd.com/baby/healthtool-ovulation-calculator

Source: webMD