If you are using Proov Confirm PdG tests, you can manually add the peak fertility date by going into the menu in the upper right corner and selecting "Set Peak Manually." If you use this option, note that we define peak date as the first day your LH test was positive, or the day of your most fertile cervical mucus. If you are using Proov Predict tests or the Proov Complete system, the app will set peak fertility for you automatically based on your test results.