Cycle length is the average time to finish a menstrual cycle, typically 28 days from beginning to end. (The first day of menstrual bleeding is cycle day 1. Continue counting until the first day of menstrual bleeding of your next cycle.)
Your luteal phase begins the day after ovulation and runs through the remainder of your cycle (ending the day before your next period). Typically, it lasts 10 - 16 days and is consistent from cycle to cycle, averaging 14 days for most women. You can leave this field blank and we will use the average.