At the top of the Cycles Reviewer page there's a table outlining the basic statistics of your finished cycles. It tells you the  the average, the minimum and the maximum length of your cycles; on average, on which day of the cycle, at the earliest and at the latest, your ovulation falls; and the average, the minimum and the maximum length of your luteal phase. (What is a luteal phase?)

The number of cycles used to calculate the displayed statistics is noted above the table. All the cycles you manage at OvuFriend are automatically included in the statistics, except for any you have set up for manual detection of ovulation (not recommended by OvuFriend). If you'd like to see the list of cycles included in the statistics, click Settings / Cycles. If a given cycle is accompanied by the box "include in analysis", it means the cycle is included in the displayed statistics. Remember: all the cycles included in this list are taken into consideration when analyzing your fertility and determining the date of your ovulation. If you think that a particular cycle may disrupt your statistics (have a negative effect on the interpretation of your current fertility), you may exclude it from this list. (read more: How do I exclude an unrepresentative cycle from my Analysis and Statistics?)