Differences between Ovulation Calendar and Fertility Calendar

Enter the beginning day of your most recent menstrual cycle first. Then add the length of your menstrual periods on average (average is usually around 28-29 days). You can leave them at their default levels if you don't know the precise duration of your menstrual cycle or luteal phase (menstrual cycle: 28 days, luteal phase: 14 days). Try to keep t...