What is the “luteal phase” and how is it used to predict ovulation?
The luteal phase is the part of the cycle that starts at ovulation and ends the day before your next period. The day of ovulation is predicted by subtracting the length of the luteal phase from the first day of the next expected period. Typically, the duration of the luteal phase phase lasts between 10 and 16 days – and is generally consistent from cycle to cycle, averaging for most women at 14 days. You may adjust the luteal phase by going to “Ovulation” on the “Settings” view.
