Www.Ovulation Calendar. Understanding the fertile window is crucial, this is the right time when sexual intercourse is most likely to result in pregnancy. Try our ovulation calculator and get an amazingly accurate fertility calendar just for you.
However, your fertile window extends beyond ovulation, often including the five days leading up to it and the day after. The momjunction ovulation calculator gives you the tentative dates of your fertility window when you type in your lmp (last menstrual period) and average cycle length.