Thank you for your feedback. I have taken a look at your charts and unfortunately in the cycles where you have ovulated, the reason you have not received confirmation of ovulation is because you have multiple missing days of data during your cycle. The App is simply unable to provide a prediction, when it doesn't have the data to predict with. Please ensure that you wear your Sensor every night as soon as your period has finishes, right up until you receive confirmation of ovulation or your next period arrives. If you have any further questions, please do not hesitate to get in touch with us via the Customer Support page on our website. Many Thanks, The OvuSense Team