How many days is the typical fertility cycle?

The typical fertility cycle, also known as the menstrual cycle, averages about 28 days, though it can range from 21 to 35 days in adults. This cycle includes phases such as menstruation, the follicular phase, ovulation, and the luteal phase. Ovulation usually occurs around the midpoint of the cycle, approximately 14 days before the start of the next menstrual period. Understanding this cycle helps in identifying fertile Windows for conception.