To use the calendar, simply enter the first day of your last period (the first day of menstrual bleeding), your average cycle length, and the length of your luteal phase. The Luteal Phase is the period of time starting day after ovulation and running through the remainder of your menstrual cycle. If you do not know your luteal phase, leave blank (the ovulation calendar will default to 14 days).
The ovulation calendar program provides approximate dates for predicting ovulation, and assists in determining when to begin ovulation testing. Please visit our instructions pages for more on when to begin using ovulation tests during your cycle.
First Day of Last Menstrual Period
