Identifies your 2 most fertile days, so you can maximize your chances of getting pregnant naturally 99% accurate at detecting the LH surge The user simply needs to utilize the ovulation tests throughout the cycle to identify what days offer the highest chance of conception. To confirm conception, one can use the pregnancy Clearblue test kit for fast and accurate results to confirm or deny pregnancy status For any cycle length. One pack is sufficient for most women with regular cycles. If your cycle varies by more than 3 days, you may need to use additional sticks to detect your LH surge Family planning can be easier with the help of a Ovulation Kit. This complete set and test identifies the two most fertile days and is 99 percent accurate at detecting the luteinizing hormone (LH) surge. This ovulation test kit is easy to use and is suitable for use with any cycle length.