Clearblue Digital Ovulation Test is a comprehensive fertility monitoring system that includes 10 test sticks. This digital test identifies your 2 most fertile days by detecting the surge in luteinizing hormone (LH) that triggers ovulation. The test provides clear digital smiley face results to indicate peak fertility days. For best results, testing should be done at the same time each day during your expected fertile window. As this is a personal medical diagnostic device, please carefully read all included instructions before use and consult with a healthcare provider regarding proper timing and interpretation of results.