The Clearblue Advanced Digital Ovulation Test Kit contains 10 tests that help identify your most fertile days by detecting 2 key fertility hormones. With over 99% accuracy, this digital test typically identifies 4 or more fertile days during your cycle. This test kit uses digital technology to detect both luteinizing hormone (LH) and estrogen hormones to maximize chances of conception. The clear digital display shows three levels - Low, High and Peak fertility - making results easy to interpret. As the #1 doctor recommended brand, it provides advanced notice of ovulation to help couples plan intercourse during the most fertile window. The kit includes 10 test sticks and a digital test holder. For best results, testing should begin according to your cycle length as indicated in the instructions.