Clearblue is the #1 Ovulation Brand recommended by OB/GYNs(1) Identifies your 2 most fertile days, so you can maximize your chances of getting pregnant naturally 99% accurate at detecting the LH surge Easy to use 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 Ovulation Kit Combo Pack - 10 ovulation test sticks, 1 pregnancy test