I'm seeing a valley before or after my predicted fertile window, what should I do?Updated 8 months ago

The fertile window prediction provided by kegg is an estimate based on your data to help guide you. During your first cycle, this prediction is based on the cycle length you entered when setting up your account. For subsequent cycles, it is refined using your past trends to give you a forecast of when your fertile valley is most likely to form.

However, fertility is dynamic, and it’s important to focus on your kegg readings and trend line. If you notice your readings moving downward—whether within or outside the predicted fertile window—you should assume your fertile window is opening. The descending readings suggest the mucus is becoming more fertile, slippery, and sperm-friendly. Timing your efforts throughout the fertile valley you observe will optimize your chances of conception, even if it doesn’t align perfectly with the prediction.If your cycles are irregular, there is a higher likelihood that you may experience multiple fertile valleys- when one valley is not successful for ovulation and a subsequent valley forms. Ovulation cannot be confirmed by kegg data, however, tracking your basal body temperature can be very helpful if your cycle lengths are very variable to determine if and when your fertile valley was successful for ovulation.              

Why Do Valleys Form Outside the Predicted Window that are not when I am fertile?
It’s normal and expected to see dips outside of your fertile valley. There are numerous cervical mucus changes throughout the cycle. For example:

Many users notice a dip in kegg readings shortly after their period ends.
kegg readings often dip during the luteal phase (the time between ovulation and the start of your next cycle) unlike basal body temperature (BBT), which shifts only after ovulation,